{"id":289,"date":"2024-10-22T13:29:31","date_gmt":"2024-10-22T17:29:31","guid":{"rendered":"https:\/\/opentextbc.ca\/plumbing4d\/?post_type=back-matter&p=289"},"modified":"2025-05-05T17:19:34","modified_gmt":"2025-05-05T21:19:34","slug":"self-tests","status":"publish","type":"back-matter","link":"https:\/\/opentextbc.ca\/plumbing4d\/back-matter\/self-tests\/","title":{"raw":"Appendix 1: Self-Tests","rendered":"Appendix 1: Self-Tests"},"content":{"raw":"This chapter contains all of the Self-Tests in a text format. Answers can be found in Appendix 2: Self-Test Answer Keys<\/a>.\r\n

Self-Test 1<\/h1>\r\nFound in Competency D1, Learning Task 1<\/a>\r\n
\r\n

Self-Test 1<\/p>\r\n\r\n<\/header>\r\n

\r\n
    \r\n \t
  1. Which of the following choices does the SSR (Sewerage System Regulation) not<\/em> address?\r\n
      \r\n \t
    1. Lagoons<\/li>\r\n \t
    2. Type 1 septic systems<\/li>\r\n \t
    3. Holding tanks and privies<\/li>\r\n \t
    4. Type 2 and 3 septic systems<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
    5. Which of the following is not<\/em> allowed to plan, install, or maintain a sewerage system in British Columbia?\r\n
        \r\n \t
      1. A plumber<\/li>\r\n \t
      2. An ROWP<\/li>\r\n \t
      3. A professional<\/li>\r\n \t
      4. An authorized person<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
      5. Which of the following is a designation of ROWP that is not<\/em> addressed in the SSR?\r\n
          \r\n \t
        1. Planner<\/li>\r\n \t
        2. Installer<\/li>\r\n \t
        3. Private Inspector<\/li>\r\n \t
        4. Maintenance Provider<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
        5. The SSR expects what quality of water from the septic system by the time it reaches the limiting layer?\r\n
            \r\n \t
          1. Useable<\/li>\r\n \t
          2. Potable<\/li>\r\n \t
          3. Seasonal<\/li>\r\n \t
          4. Recreational<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
          5. In which part of a sewerage system are anaerobic bacteria mainly found?\r\n
              \r\n \t
            1. The field piping<\/li>\r\n \t
            2. The septic tank<\/li>\r\n \t
            3. The distribution box<\/li>\r\n \t
            4. The house plumbing<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
            5. In which part of a sewerage system are aerobic bacteria mainly found?\r\n
                \r\n \t
              1. The field piping<\/li>\r\n \t
              2. The septic tank<\/li>\r\n \t
              3. The distribution box<\/li>\r\n \t
              4. The house plumbing<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
              5. Which of the following indicates sewage strength and represents the total amount of oxygen, in mg\/L, used by microorganisms in decomposing one litre of organic matter in a 5-day period?\r\n
                  \r\n \t
                1. ASTTBC<\/li>\r\n \t
                2. BOD5<\/sub><\/li>\r\n \t
                3. SPM<\/li>\r\n \t
                4. TSS<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                5. Which of the following is not<\/em> included in the scope of the SSR?\r\n
                    \r\n \t
                  1. Duplexes<\/li>\r\n \t
                  2. Single family dwellings<\/li>\r\n \t
                  3. 2 houses on a single parcel of land<\/li>\r\n \t
                  4. Houses discharging > 22700<\/span> litres\/day<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                  5. What does \u201careas used to receive effluent discharged from a treatment method\u201d describe?\r\n
                      \r\n \t
                    1. Disposal areas<\/li>\r\n \t
                    2. Dispersal areas<\/li>\r\n \t
                    3. Discharge areas<\/li>\r\n \t
                    4. Displacement areas<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                    5. Which of the following is considered the most difficult and complex factor in choosing an appropriate dispersal method?\r\n
                        \r\n \t
                      1. A soil analysis<\/li>\r\n \t
                      2. A cost analysis<\/li>\r\n \t
                      3. A property survey<\/li>\r\n \t
                      4. Equipment availability<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n<\/div>\r\n<\/div>\r\n

                        Self-Test 2<\/h1>\r\nFound in Competency D1, Learning Task 1<\/a>\r\n
                        \r\n

                        Self-Test 2<\/p>\r\n\r\n<\/header>\r\n

                        \r\n
                          \r\n \t
                        1. A septic tank, distribution box and dispersal field is known as what type of system?\r\n
                            \r\n \t
                          1. Type 1<\/li>\r\n \t
                          2. Type 2<\/li>\r\n \t
                          3. Type 3<\/li>\r\n \t
                          4. Type 4<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                          5. All prefabricated septic tanks must be constructed to standards found in what document?\r\n
                              \r\n \t
                            1. CAN\/CSA B149.1<\/li>\r\n \t
                            2. CAN\/CSA B66-00<\/li>\r\n \t
                            3. BC Plumbing Code<\/li>\r\n \t
                            4. National Plumbing Code of Canada<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                            5. Which one of the following choices is not<\/em> a \u201clayer\u201d associated with the contents of a septic tank?\r\n
                                \r\n \t
                              1. Scum<\/li>\r\n \t
                              2. Sludge<\/li>\r\n \t
                              3. Septics<\/li>\r\n \t
                              4. Effluent<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                              5. What component is fitted to the baffle at the outlet of a septic tank that prevents large particles from leaving the tank and passing into the dispersal system?\r\n
                                  \r\n \t
                                1. A float switch<\/li>\r\n \t
                                2. A screen<\/li>\r\n \t
                                3. A sieve<\/li>\r\n \t
                                4. A filter<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                5. What is the term given to the act of flooding the dispersal field with a high flow rate of effluent from the primary treatment component?\r\n
                                    \r\n \t
                                  1. Dosing<\/li>\r\n \t
                                  2. Saturation<\/li>\r\n \t
                                  3. Evacuation<\/li>\r\n \t
                                  4. Bombardment<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                  5. Aerobic treatment units (ATUs) produce effluent that is typically categorized as what type?\r\n
                                      \r\n \t
                                    1. Type 1<\/li>\r\n \t
                                    2. Type 2<\/li>\r\n \t
                                    3. Type 3<\/li>\r\n \t
                                    4. Type 4<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                    5. Which one of the following choices would use a distribution box?\r\n
                                        \r\n \t
                                      1. At Grade system<\/li>\r\n \t
                                      2. Pressure distribution<\/li>\r\n \t
                                      3. Alberta At Grade system<\/li>\r\n \t
                                      4. Trickling or gravity distribution<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                      5. What can be installed in the pipe outlets of a distribution box to ensure that the invert openings are all at the same elevation, thereby allowing equal flow to all the laterals?\r\n
                                          \r\n \t
                                        1. Speed levelers<\/li>\r\n \t
                                        2. Quick openings<\/li>\r\n \t
                                        3. Pipe invert rotators<\/li>\r\n \t
                                        4. Elevation equalizers<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                        5. What component is fitted to both septic tanks and distribution boxes to allow easy entry and assist in periodic maintenance and inspection without the need for excavating?\r\n
                                            \r\n \t
                                          1. Ladders<\/li>\r\n \t
                                          2. Access risers<\/li>\r\n \t
                                          3. Inspection ports<\/li>\r\n \t
                                          4. Egress openings<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                          5. What is the width of the bottom of a typical Type 1 distribution trench?\r\n
                                              \r\n \t
                                            1. 12\u201318 inches<\/li>\r\n \t
                                            2. 15\u201330 inches<\/li>\r\n \t
                                            3. 18\u201336 inches<\/li>\r\n \t
                                            4. 48\u201384 inches<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                            5. What type of bacteria are at work in a dispersal system, that render the effluent harmless to people and the environment?\r\n
                                                \r\n \t
                                              1. E. coli<\/em><\/li>\r\n \t
                                              2. Aerobic<\/li>\r\n \t
                                              3. Anaerobic<\/li>\r\n \t
                                              4. Legionella<\/em><\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                              5. Which type of dispersal system may suffer from plugging of the first few feet or metres of the laterals over time?\r\n
                                                  \r\n \t
                                                1. Subsurface distribution<\/li>\r\n \t
                                                2. Pressure distribution<\/li>\r\n \t
                                                3. Trickling<\/li>\r\n \t
                                                4. Dosing<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                5. What device turns a dosing pump on and off?\r\n
                                                    \r\n \t
                                                  1. A float switch<\/li>\r\n \t
                                                  2. A manual switch<\/li>\r\n \t
                                                  3. A moisture meter<\/li>\r\n \t
                                                  4. In infrared scanner<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                  5. Which of the following types of dispersal systems would be well suited for smaller urban lots that may not have enough space for a conventional septic field?\r\n
                                                      \r\n \t
                                                    1. Pressure distribution<\/li>\r\n \t
                                                    2. Trickling gravity<\/li>\r\n \t
                                                    3. Dosed gravity<\/li>\r\n \t
                                                    4. Lagoon<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                    5. Which type of system uses premanufactured plastic chambers for the dispersal of effluent?\r\n
                                                        \r\n \t
                                                      1. At Grade<\/li>\r\n \t
                                                      2. Sand mound<\/li>\r\n \t
                                                      3. Gravelless Infiltrator\u00ae<\/li>\r\n \t
                                                      4. Subsurface drip dispersal<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                      5. What type of dispersal system uses a trench that is more than 90 cm but less than 3 m wide?\r\n
                                                          \r\n \t
                                                        1. Trench<\/li>\r\n \t
                                                        2. Seepage bed<\/li>\r\n \t
                                                        3. Subsurface drip<\/li>\r\n \t
                                                        4. Pressure distribution<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                        5. What is the process known as whereby water is lost from small openings in the leaves of plants and grasses?\r\n
                                                            \r\n \t
                                                          1. Respiration<\/li>\r\n \t
                                                          2. Perspiration<\/li>\r\n \t
                                                          3. Evaporation<\/li>\r\n \t
                                                          4. Transpiration<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                          5. Which of the following uses wood chips in its construction?\r\n
                                                              \r\n \t
                                                            1. Gravity distribution<\/li>\r\n \t
                                                            2. Alberta At Grade<\/li>\r\n \t
                                                            3. ETA bed<\/li>\r\n \t
                                                            4. ET bed<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                            5. Which of the following systems must be fenced?\r\n
                                                                \r\n \t
                                                              1. ETA bed<\/li>\r\n \t
                                                              2. Alberta At Grade<\/li>\r\n \t
                                                              3. Pressure distribution<\/li>\r\n \t
                                                              4. BC Zero Discharge Lagoon<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                              5. Which of the following is a system that treats and disperses wastewater in the same footprint?\r\n
                                                                  \r\n \t
                                                                1. ETA<\/li>\r\n \t
                                                                2. HLR<\/li>\r\n \t
                                                                3. CTDS<\/li>\r\n \t
                                                                4. ROWP<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n<\/div>\r\n<\/div>\r\n

                                                                  Self-Test 3<\/h1>\r\nFound in Competency D1, Learning Task 2<\/a>\r\n
                                                                  \r\n

                                                                  Self-Test 3<\/p>\r\n\r\n<\/header>\r\n

                                                                  \r\n
                                                                    \r\n \t
                                                                  1. Which one of the following processes separates silt and plastics from the wastewater?\r\n
                                                                      \r\n \t
                                                                    1. Sludge treatment<\/li>\r\n \t
                                                                    2. Tertiary treatment<\/li>\r\n \t
                                                                    3. Primary treatment<\/li>\r\n \t
                                                                    4. Secondary treatment<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                    5. Which one of the following treatments uses biological processes that break down the organic waste by using nutrients provided in the raw sewage?\r\n
                                                                        \r\n \t
                                                                      1. Sludge<\/li>\r\n \t
                                                                      2. Tertiary<\/li>\r\n \t
                                                                      3. Primary<\/li>\r\n \t
                                                                      4. Secondary<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                      5. Which one of the following choices represents a final process that municipal sewage may have to undergo to ensure that aquatic life in the final destination of the wastewater will not be harmed?\r\n
                                                                          \r\n \t
                                                                        1. Chlorination<\/li>\r\n \t
                                                                        2. De-chlorination<\/li>\r\n \t
                                                                        3. UV Sterilization<\/li>\r\n \t
                                                                        4. Ozone disinfection<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                        5. Which one of the following processes uses anaerobic digesters, with the production of methane gas as a main by-product?\r\n
                                                                            \r\n \t
                                                                          1. Sludge treatment<\/li>\r\n \t
                                                                          2. Tertiary treatment<\/li>\r\n \t
                                                                          3. Primary treatment<\/li>\r\n \t
                                                                          4. Secondary treatment<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                          5. What is the common destination for the waste sludge obtained through the processing of wastewater in a modern municipal sewage treatment plant?\r\n
                                                                              \r\n \t
                                                                            1. A body of water<\/li>\r\n \t
                                                                            2. A sanitary landfill<\/li>\r\n \t
                                                                            3. A secondary clarifier<\/li>\r\n \t
                                                                            4. A tract of agricultural land<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n<\/div>\r\n<\/div>\r\n

                                                                              Self-Test 4<\/h1>\r\nFound in Competency D1, Learning Task 3<\/a>\r\n
                                                                              \r\n

                                                                              Self-Test 4<\/p>\r\n\r\n<\/header>\r\n

                                                                              \r\n
                                                                                \r\n \t
                                                                              1. What is the first step in the planning process for the installation of a residential onsite sewage treatment system?\r\n
                                                                                  \r\n \t
                                                                                1. Perform a soils analysis<\/li>\r\n \t
                                                                                2. Select a dispersal method<\/li>\r\n \t
                                                                                3. Select the treatment method<\/li>\r\n \t
                                                                                4. Gather information from the owner<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                5. What is the term used that defines the estimated peak flow that will be discharged to the septic system and for which the system is designed?\r\n
                                                                                    \r\n \t
                                                                                  1. Sewage output<\/li>\r\n \t
                                                                                  2. Daily design flow<\/li>\r\n \t
                                                                                  3. Weekly wastewater<\/li>\r\n \t
                                                                                  4. Yearly flow average<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                  5. Refer to Table II-8. What would be the DDF for a residence that has 4 bedrooms and a living area of 345 m2<\/sup>?\r\n
                                                                                      \r\n \t
                                                                                    1. 1300<\/span> litres\/day<\/li>\r\n \t
                                                                                    2. 1345<\/span> litres\/day<\/li>\r\n \t
                                                                                    3. 1600<\/span> litres\/day<\/li>\r\n \t
                                                                                    4. 1645<\/span> litres\/day<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                    5. What is to be the increase in the DDF if a garbage grinder or garburator is used?\r\n
                                                                                        \r\n \t
                                                                                      1. 50%<\/li>\r\n \t
                                                                                      2. 40%<\/li>\r\n \t
                                                                                      3. 30%<\/li>\r\n \t
                                                                                      4. 5%<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                      5. Refer to Table II-9. What would be the DDF for a seasonal cottage with 3 bedrooms?\r\n
                                                                                          \r\n \t
                                                                                        1. 1312.5<\/span> litres\/day<\/li>\r\n \t
                                                                                        2. 1300<\/span> litres\/day<\/li>\r\n \t
                                                                                        3. 937.5 litres\/day<\/li>\r\n \t
                                                                                        4. 750 litres\/day<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                        5. Arrange the following criteria in the proper order:\r\n
                                                                                            \r\n \t
                                                                                          1. Determine the DDF<\/li>\r\n \t
                                                                                          2. Meet with the owner<\/li>\r\n \t
                                                                                          3. Select the dispersal method<\/li>\r\n \t
                                                                                          4. Select the treatment method<\/li>\r\n<\/ol>\r\n \r\n
                                                                                              \r\n \t
                                                                                            1. 2, 1, 3, 4<\/li>\r\n \t
                                                                                            2. 4, 3, 2, 1<\/li>\r\n \t
                                                                                            3. 2, 1, 4, 3<\/li>\r\n \t
                                                                                            4. 3, 4, 2, 1<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                            5. What term defines the measure of the volume of effluent, in litres, applied each day, per unit area (m2<\/sup>) of infiltrative surface?\r\n
                                                                                                \r\n \t
                                                                                              1. Area of infiltrative surface<\/li>\r\n \t
                                                                                              2. Hydraulic loading rate<\/li>\r\n \t
                                                                                              3. Vertical separation<\/li>\r\n \t
                                                                                              4. Restrictive layer<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                              5. What term defines a layer of soil, rock, hardpan, glacial rock and unstructured clay soils?\r\n
                                                                                                  \r\n \t
                                                                                                1. Limiting layer<\/li>\r\n \t
                                                                                                2. Blinding layer<\/li>\r\n \t
                                                                                                3. Restrictive layer<\/li>\r\n \t
                                                                                                4. Vertical separation<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                5. What term defines the depth of unsaturated, original, undisturbed permeable soil below the infiltrative surface and above any limiting layer?\r\n
                                                                                                    \r\n \t
                                                                                                  1. Soil horizon<\/li>\r\n \t
                                                                                                  2. Blinding layer<\/li>\r\n \t
                                                                                                  3. Infiltrative surface<\/li>\r\n \t
                                                                                                  4. Vertical separation<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                  5. What term defines the layers of soil approximately parallel to the land surface and different from adjacent layers in physical, chemical and biological properties?\r\n
                                                                                                      \r\n \t
                                                                                                    1. Soil horizon<\/li>\r\n \t
                                                                                                    2. Limiting layer<\/li>\r\n \t
                                                                                                    3. Blinding layer<\/li>\r\n \t
                                                                                                    4. Vertical separation<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                    5. What term defines a layer of clean coarse sand or mound sand that is installed between the infiltrative surface and the native soil, and which is up to 10 cm (4 in.) thick?\r\n
                                                                                                        \r\n \t
                                                                                                      1. Limiting layer<\/li>\r\n \t
                                                                                                      2. Blinding layer<\/li>\r\n \t
                                                                                                      3. Restrictive layer<\/li>\r\n \t
                                                                                                      4. Vertical separation<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                      5. Why is heavy clay not favourable for a disposal field?\r\n
                                                                                                          \r\n \t
                                                                                                        1. Clay is too hard to dig through<\/li>\r\n \t
                                                                                                        2. The clay will block flow through it<\/li>\r\n \t
                                                                                                        3. The clay will allow too much flow through it<\/li>\r\n \t
                                                                                                        4. The clay will stick to tools when trying to excavate<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                        5. Why is coarse, grainy soil, such as gravel or sand, not favourable for a disposal field?\r\n
                                                                                                            \r\n \t
                                                                                                          1. Flow through it will be too fast<\/li>\r\n \t
                                                                                                          2. Flow through it will be too slow<\/li>\r\n \t
                                                                                                          3. There will be no flow through it<\/li>\r\n \t
                                                                                                          4. Sand and gravel will compact too much<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                          5. If \u201cNA\u201d is encountered in any of the tables for determining soil conditions for a conventional trench system, what is the expected outcome?\r\n
                                                                                                              \r\n \t
                                                                                                            1. Use a seepage bed system<\/li>\r\n \t
                                                                                                            2. Double the length of the field piping<\/li>\r\n \t
                                                                                                            3. Use an above grade system or a lagoon<\/li>\r\n \t
                                                                                                            4. The soil cannot support the use of any type of dispersal system<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                            5. What is the expression of the flow rate associated with a percolation test?\r\n
                                                                                                                \r\n \t
                                                                                                              1. Minutes per inch<\/li>\r\n \t
                                                                                                              2. Minutes per foot<\/li>\r\n \t
                                                                                                              3. Hours per inch<\/li>\r\n \t
                                                                                                              4. Hours per foot<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                              5. Which table from the SPM will determine whether a gravity distribution system is allowed or not allowed?\r\n
                                                                                                                  \r\n \t
                                                                                                                1. Table II-5<\/li>\r\n \t
                                                                                                                2. Table II-6<\/li>\r\n \t
                                                                                                                3. Table II-7<\/li>\r\n \t
                                                                                                                4. Table II-21<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                5. If soil constraints disallow the use of a gravity or dosed gravity distribution system, which table would provide guidance as to other options for dispersal?\r\n
                                                                                                                    \r\n \t
                                                                                                                  1. Table II-5<\/li>\r\n \t
                                                                                                                  2. Table II-6<\/li>\r\n \t
                                                                                                                  3. Table II-7<\/li>\r\n \t
                                                                                                                  4. Table II-21<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                  5. Which of the following determines the length of trenches needed for a dispersal field?\r\n
                                                                                                                      \r\n \t
                                                                                                                    1. AIS divided by trench width<\/li>\r\n \t
                                                                                                                    2. DDS divided by perc rate<\/li>\r\n \t
                                                                                                                    3. HLR multiplied by DDF<\/li>\r\n \t
                                                                                                                    4. DDS divided by HLR<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                    5. What is meant by a \u201cseparation layer\u201d in a distribution trench?\r\n
                                                                                                                        \r\n \t
                                                                                                                      1. A layer of sand over the gravel<\/li>\r\n \t
                                                                                                                      2. The cover soil layer over the pipe<\/li>\r\n \t
                                                                                                                      3. The gravel over the unsaturated soil<\/li>\r\n \t
                                                                                                                      4. Lightweight, non-woven geotextile over the gravel<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                      5. What is the suggested minimum distance between laterals in a typical trench installation?\r\n
                                                                                                                          \r\n \t
                                                                                                                        1. 3 m<\/li>\r\n \t
                                                                                                                        2. 1.8 m<\/li>\r\n \t
                                                                                                                        3. 1 m<\/li>\r\n \t
                                                                                                                        4. 90 cm<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                        5. What is the suggested depth of gravel below a lateral in a trench?\r\n
                                                                                                                            \r\n \t
                                                                                                                          1. No more than 5 cm<\/li>\r\n \t
                                                                                                                          2. More than 15 cm<\/li>\r\n \t
                                                                                                                          3. More than 90 cm<\/li>\r\n \t
                                                                                                                          4. At least 1.8 m<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                          5. What is the suggested minimum depth of cover soil over a trench?\r\n
                                                                                                                              \r\n \t
                                                                                                                            1. 5 cm<\/li>\r\n \t
                                                                                                                            2. 15 cm<\/li>\r\n \t
                                                                                                                            3. 90 cm<\/li>\r\n \t
                                                                                                                            4. 1.8 m<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                            5. What is suggested to be installed at the base of an observation port, to prevent pullout?\r\n
                                                                                                                                \r\n \t
                                                                                                                              1. Nothing<\/li>\r\n \t
                                                                                                                              2. A coupling<\/li>\r\n \t
                                                                                                                              3. A pipe plug<\/li>\r\n \t
                                                                                                                              4. A toilet flange<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                              5. What is the suggested maximum width of a trench bottom?\r\n
                                                                                                                                  \r\n \t
                                                                                                                                1. 15 cm<\/li>\r\n \t
                                                                                                                                2. 60 cm<\/li>\r\n \t
                                                                                                                                3. 90 cm<\/li>\r\n \t
                                                                                                                                4. 1.8 m<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                5. What are the suggested sizes of pipe for the observation ports?\r\n
                                                                                                                                    \r\n \t
                                                                                                                                  1. 2\u2033 or 3\u2033<\/li>\r\n \t
                                                                                                                                  2. 3\u2033 or 4\u2033<\/li>\r\n \t
                                                                                                                                  3. 4\u2033 or 6\u2033<\/li>\r\n \t
                                                                                                                                  4. 6\u2033 or 8\u2033<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n<\/div>\r\n<\/div>\r\n

                                                                                                                                    Self-Test 5<\/h1>\r\nFound in Competency D1, Learning Task 3<\/a>\r\n
                                                                                                                                    \r\n

                                                                                                                                    Self-Test 5<\/p>\r\n\r\n<\/header>\r\n

                                                                                                                                    \r\n
                                                                                                                                      \r\n \t
                                                                                                                                    1. Which of the following is not<\/em> a contributor to good septic tank performance?\r\n
                                                                                                                                        \r\n \t
                                                                                                                                      1. Larger surface area<\/li>\r\n \t
                                                                                                                                      2. Shorter distance between inlet and outlet pipes<\/li>\r\n \t
                                                                                                                                      3. Longer distance between inlet and outlet pipes<\/li>\r\n \t
                                                                                                                                      4. Smaller, letterbox-sized openings between the first and second compartment<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                      5. What type of desired flow through a septic tank is achieved using an inlet baffle?\r\n
                                                                                                                                          \r\n \t
                                                                                                                                        1. Violent<\/li>\r\n \t
                                                                                                                                        2. Turbulent<\/li>\r\n \t
                                                                                                                                        3. Quiescent<\/li>\r\n \t
                                                                                                                                        4. Excessive<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                        5. What would be the minimum working volume of a septic tank if the DDF was not > 9100<\/span> litres\/day?\r\n
                                                                                                                                            \r\n \t
                                                                                                                                          1. 1000<\/span> litres<\/li>\r\n \t
                                                                                                                                          2. 1500<\/span> litres<\/li>\r\n \t
                                                                                                                                          3. 15000<\/span> litres<\/li>\r\n \t
                                                                                                                                          4. 3 times the DDF<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                          5. For 2-compartment tanks, or 2 tanks in series, what does the SPM specify as to the volume of the first tank or compartment?\r\n
                                                                                                                                              \r\n \t
                                                                                                                                            1. 100% to 75% of the total working volume<\/li>\r\n \t
                                                                                                                                            2. 75% to 50% of the total working volume<\/li>\r\n \t
                                                                                                                                            3. 67% to 50% of the total working volume<\/li>\r\n \t
                                                                                                                                            4. 50% to 25% of the total working volume<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                            5. What is the minimum suggested interval between pumpouts for a septic tank?\r\n
                                                                                                                                                \r\n \t
                                                                                                                                              1. 1 year<\/li>\r\n \t
                                                                                                                                              2. 2 years<\/li>\r\n \t
                                                                                                                                              3. 3 years<\/li>\r\n \t
                                                                                                                                              4. 5 years<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                              5. Which of the following is not<\/em> listed as a reason for the use of a larger tank rather than one of minimum size?\r\n
                                                                                                                                                  \r\n \t
                                                                                                                                                1. Lower cost of pumpouts over time<\/li>\r\n \t
                                                                                                                                                2. Improved oil and grease separation<\/li>\r\n \t
                                                                                                                                                3. Improved suspended solids removal<\/li>\r\n \t
                                                                                                                                                4. Increased intervals between pumpouts<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                5. What is the minimum grade allowable, by most plumbing codes, for a 4-inch building sewer?\r\n
                                                                                                                                                    \r\n \t
                                                                                                                                                  1. [latex]\\frac{1}{16}''\/\\text{ft }\\left(\\frac{1}{200}\\right)[\/latex]<\/li>\r\n \t
                                                                                                                                                  2. [latex]\\frac{1}{8}''\/\\text{ft }\\left(\\frac{1}{100}\\right)[\/latex]<\/li>\r\n \t
                                                                                                                                                  3. [latex]\\frac{1}{4}''\/\\text{ft }\\left(\\frac{1}{50}\\right)[\/latex]<\/li>\r\n \t
                                                                                                                                                  4. [latex]\\frac{1}{2}''\/\\text{ft }\\left(\\frac{1}{25}\\right)[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                  5. How is mandatory venting of a septic tank normally achieved?\r\n
                                                                                                                                                      \r\n \t
                                                                                                                                                    1. By a 2-inch vent at the bottom of the tank<\/li>\r\n \t
                                                                                                                                                    2. By a 4-inch vent at the top of the tank<\/li>\r\n \t
                                                                                                                                                    3. Through a vent in the dispersal field<\/li>\r\n \t
                                                                                                                                                    4. Through the building sewer<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                    5. What are access \u201ctunnels\u201d from ground level to the septic tank known as?\r\n
                                                                                                                                                        \r\n \t
                                                                                                                                                      1. Drops<\/li>\r\n \t
                                                                                                                                                      2. Risers<\/li>\r\n \t
                                                                                                                                                      3. Vaults<\/li>\r\n \t
                                                                                                                                                      4. Chambers<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                      5. Within what distance from risers or access lids should components that may need to be periodically checked or maintained be?\r\n
                                                                                                                                                          \r\n \t
                                                                                                                                                        1. 5 cm<\/li>\r\n \t
                                                                                                                                                        2. 15 cm<\/li>\r\n \t
                                                                                                                                                        3. 90 cm<\/li>\r\n \t
                                                                                                                                                        4. 1 m<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                        5. What is the suggested minimum internal diameter of a riser that is not over 90 cm long?\r\n
                                                                                                                                                            \r\n \t
                                                                                                                                                          1. 15 cm<\/li>\r\n \t
                                                                                                                                                          2. 50 cm<\/li>\r\n \t
                                                                                                                                                          3. 76 cm<\/li>\r\n \t
                                                                                                                                                          4. 90 cm<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                          5. What is the minimum horizontal separation distance from a septic tank to a domestic water supply well?\r\n
                                                                                                                                                              \r\n \t
                                                                                                                                                            1. 25 ft (7.5 m)<\/li>\r\n \t
                                                                                                                                                            2. 50 ft (15 m)<\/li>\r\n \t
                                                                                                                                                            3. 100 ft (30 m)<\/li>\r\n \t
                                                                                                                                                            4. 200 ft (60 m)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                            5. What is the minimum horizontal separation distance from a dispersal system to a drinking water line that is under pressure?\r\n
                                                                                                                                                                \r\n \t
                                                                                                                                                              1. 3 ft (0.9 m)<\/li>\r\n \t
                                                                                                                                                              2. 10 ft (3 m)<\/li>\r\n \t
                                                                                                                                                              3. 25 ft (7.5 m)<\/li>\r\n \t
                                                                                                                                                              4. 50 ft (15 m)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                              5. What is the minimum horizontal separation distance between a dispersal system and a lake?\r\n
                                                                                                                                                                  \r\n \t
                                                                                                                                                                1. 33 ft (10 m)<\/li>\r\n \t
                                                                                                                                                                2. 50 ft (15 m)<\/li>\r\n \t
                                                                                                                                                                3. 100 ft (30 m)<\/li>\r\n \t
                                                                                                                                                                4. 200 ft (60 m)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                5. What is the minimum horizontal separation distance between a septic tank and a dispersal field lateral?\r\n
                                                                                                                                                                    \r\n \t
                                                                                                                                                                  1. 0.9 metres (3 feet)<\/li>\r\n \t
                                                                                                                                                                  2. 1.5 metres (5 feet)<\/li>\r\n \t
                                                                                                                                                                  3. 1.8 metres (6 feet)<\/li>\r\n \t
                                                                                                                                                                  4. 3 metres (10 feet)<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n<\/div>\r\n<\/div>\r\n

                                                                                                                                                                    Self-Test 1<\/h1>\r\nFound in Competency D2, Learning Task 4<\/a>\r\n
                                                                                                                                                                    \r\n

                                                                                                                                                                    Self-Test 1<\/p>\r\n\r\n<\/header>\r\n

                                                                                                                                                                    \r\n
                                                                                                                                                                      \r\n \t
                                                                                                                                                                    1. If, during a water test of a tank, a loss of 10 litres of water was reflected in the water level in the riser dropping 3.5 cm, what size would the riser be?\r\n
                                                                                                                                                                        \r\n \t
                                                                                                                                                                      1. 46 cm (18 in.)<\/li>\r\n \t
                                                                                                                                                                      2. 61 cm (24 in.)<\/li>\r\n \t
                                                                                                                                                                      3. 76 cm (30 in.)<\/li>\r\n \t
                                                                                                                                                                      4. 91 cm (36 in.)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                      5. If a vacuum test is used instead of a water test, what is the expected loss of vacuum within the first 5 minutes?\r\n
                                                                                                                                                                          \r\n \t
                                                                                                                                                                        1. \u00bd inch of mercury<\/li>\r\n \t
                                                                                                                                                                        2. 1 inch of mercury<\/li>\r\n \t
                                                                                                                                                                        3. \u00bd inch of water column<\/li>\r\n \t
                                                                                                                                                                        4. 1 inch of water column<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                        5. A dosed gravity distribution system should have at least how much of its volume filled on every dose?\r\n
                                                                                                                                                                            \r\n \t
                                                                                                                                                                          1. 50%<\/li>\r\n \t
                                                                                                                                                                          2. 67%<\/li>\r\n \t
                                                                                                                                                                          3. 75%<\/li>\r\n \t
                                                                                                                                                                          4. 100%<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                          5. To what minimum height should the water columns in a squirt test rise if the orifices are 4.2 mm [latex]\\left(\\frac{11}{64}''\\right)[\/latex] in diameter?\r\n
                                                                                                                                                                              \r\n \t
                                                                                                                                                                            1. 60 cm (24 in.)<\/li>\r\n \t
                                                                                                                                                                            2. 90 cm (36 in.)<\/li>\r\n \t
                                                                                                                                                                            3. 120 cm (48 in.)<\/li>\r\n \t
                                                                                                                                                                            4. 150 cm (60 in.)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                            5. Which of the following must an AP check for during the first 12\u201314 months of operation of a Type 1 sewerage system?\r\n
                                                                                                                                                                                \r\n \t
                                                                                                                                                                              1. Fecal coliforms<\/li>\r\n \t
                                                                                                                                                                              2. BOD5<\/sub> and TSS<\/li>\r\n \t
                                                                                                                                                                              3. Sludge level<\/li>\r\n \t
                                                                                                                                                                              4. Flow<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                              5. According to the information in Table III-35, what is the suggested pump out frequency for a 4500<\/span> litre (1000<\/span> Imp. Gal.) septic tank that serves a household occupancy of 4 people?\r\n
                                                                                                                                                                                  \r\n \t
                                                                                                                                                                                1. 3.7 years<\/li>\r\n \t
                                                                                                                                                                                2. 5.2 years<\/li>\r\n \t
                                                                                                                                                                                3. 6.8 years<\/li>\r\n \t
                                                                                                                                                                                4. 8 years<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                                5. What is the black, jelly-like permeable layer that forms in the soil in the drain field\u2019s trenches known as?\r\n
                                                                                                                                                                                    \r\n \t
                                                                                                                                                                                  1. Biomat<\/li>\r\n \t
                                                                                                                                                                                  2. Effluent<\/li>\r\n \t
                                                                                                                                                                                  3. Field tar<\/li>\r\n \t
                                                                                                                                                                                  4. Septic jelly<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                                  5. What effect does the formation of the substance in the previous question have on the flow rate and filtration of viruses and pathogens in the wastewater?\r\n
                                                                                                                                                                                      \r\n \t
                                                                                                                                                                                    1. It slows the flow and cuts filtration time down<\/li>\r\n \t
                                                                                                                                                                                    2. It speeds the flow and cuts filtration time down<\/li>\r\n \t
                                                                                                                                                                                    3. It slows the flow and gives more time for filtration<\/li>\r\n \t
                                                                                                                                                                                    4. It speeds the flow and gives more time for filtration<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                                    5. Which of the following would not<\/em> be a contributor to maintaining a healthy septic field?\r\n
                                                                                                                                                                                        \r\n \t
                                                                                                                                                                                      1. Perform routine maintenance<\/li>\r\n \t
                                                                                                                                                                                      2. Avoid hydraulic overload<\/li>\r\n \t
                                                                                                                                                                                      3. Flush bleach periodically<\/li>\r\n \t
                                                                                                                                                                                      4. Maintain filters<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                                      5. Which of the following choices is not<\/em> listed as a common issue with a malfunctioning septic system?\r\n
                                                                                                                                                                                          \r\n \t
                                                                                                                                                                                        1. \u201cPonding\u201d<\/li>\r\n \t
                                                                                                                                                                                        2. Slow fixture drainage<\/li>\r\n \t
                                                                                                                                                                                        3. Contaminated drinking water<\/li>\r\n \t
                                                                                                                                                                                        4. Frequent dosing pump failure<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                                        5. What causes the corrosion of a concrete septic tank at points at and above the waterline?\r\n
                                                                                                                                                                                            \r\n \t
                                                                                                                                                                                          1. The formation of scum<\/li>\r\n \t
                                                                                                                                                                                          2. The formation of sludge<\/li>\r\n \t
                                                                                                                                                                                          3. The formation of effluent<\/li>\r\n \t
                                                                                                                                                                                          4. The formation of hydrochloric acid<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                                          5. Fusion (heat) welding can be a repair used on what type of permanent tank?\r\n
                                                                                                                                                                                              \r\n \t
                                                                                                                                                                                            1. Polyethylene<\/li>\r\n \t
                                                                                                                                                                                            2. Fiberglass<\/li>\r\n \t
                                                                                                                                                                                            3. Concrete<\/li>\r\n \t
                                                                                                                                                                                            4. Steel<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                                            5. Why would plastic and fibreglass tanks always need confined space entry procedures followed, whereas concrete tanks may not?\r\n
                                                                                                                                                                                                \r\n \t
                                                                                                                                                                                              1. Concrete tanks normally have larger volumes<\/li>\r\n \t
                                                                                                                                                                                              2. Fibreglass tanks don\u2019t have harmful atmospheres<\/li>\r\n \t
                                                                                                                                                                                              3. Plastic and fibreglass tanks don\u2019t have removeable lids<\/li>\r\n \t
                                                                                                                                                                                              4. Plastic tanks are usually removed for periodic inspections<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                                              5. Why are damaged distribution boxes replaced rather than repaired?\r\n
                                                                                                                                                                                                  \r\n \t
                                                                                                                                                                                                1. Their repair isn\u2019t possible<\/li>\r\n \t
                                                                                                                                                                                                2. The SPM mandates replacement<\/li>\r\n \t
                                                                                                                                                                                                3. Their cost and size are relatively small<\/li>\r\n \t
                                                                                                                                                                                                4. If they are damaged, it is because of their age<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                                                                                                                                                5. What is the process known as, whereby biological (not chemical) additives are introduced into the system to consume excessive biomat that may be clogging the system drainfield piping?\r\n
                                                                                                                                                                                                    \r\n \t
                                                                                                                                                                                                  1. Jolting the system<\/li>\r\n \t
                                                                                                                                                                                                  2. Shocking the system<\/li>\r\n \t
                                                                                                                                                                                                  3. Cleaning the system<\/li>\r\n \t
                                                                                                                                                                                                  4. Eating up the system<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n<\/div>\r\n<\/div>","rendered":"

                                                                                                                                                                                                    This chapter contains all of the Self-Tests in a text format. Answers can be found in Appendix 2: Self-Test Answer Keys<\/a>.<\/p>\n

                                                                                                                                                                                                    Self-Test 1<\/h1>\n

                                                                                                                                                                                                    Found in Competency D1, Learning Task 1<\/a><\/p>\n

                                                                                                                                                                                                    \n
                                                                                                                                                                                                    \n

                                                                                                                                                                                                    Self-Test 1<\/p>\n<\/header>\n

                                                                                                                                                                                                    \n
                                                                                                                                                                                                      \n
                                                                                                                                                                                                    1. Which of the following choices does the SSR (Sewerage System Regulation) not<\/em> address?\n
                                                                                                                                                                                                        \n
                                                                                                                                                                                                      1. Lagoons<\/li>\n
                                                                                                                                                                                                      2. Type 1 septic systems<\/li>\n
                                                                                                                                                                                                      3. Holding tanks and privies<\/li>\n
                                                                                                                                                                                                      4. Type 2 and 3 septic systems<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                      5. Which of the following is not<\/em> allowed to plan, install, or maintain a sewerage system in British Columbia?\n
                                                                                                                                                                                                          \n
                                                                                                                                                                                                        1. A plumber<\/li>\n
                                                                                                                                                                                                        2. An ROWP<\/li>\n
                                                                                                                                                                                                        3. A professional<\/li>\n
                                                                                                                                                                                                        4. An authorized person<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                        5. Which of the following is a designation of ROWP that is not<\/em> addressed in the SSR?\n
                                                                                                                                                                                                            \n
                                                                                                                                                                                                          1. Planner<\/li>\n
                                                                                                                                                                                                          2. Installer<\/li>\n
                                                                                                                                                                                                          3. Private Inspector<\/li>\n
                                                                                                                                                                                                          4. Maintenance Provider<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                          5. The SSR expects what quality of water from the septic system by the time it reaches the limiting layer?\n
                                                                                                                                                                                                              \n
                                                                                                                                                                                                            1. Useable<\/li>\n
                                                                                                                                                                                                            2. Potable<\/li>\n
                                                                                                                                                                                                            3. Seasonal<\/li>\n
                                                                                                                                                                                                            4. Recreational<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                            5. In which part of a sewerage system are anaerobic bacteria mainly found?\n
                                                                                                                                                                                                                \n
                                                                                                                                                                                                              1. The field piping<\/li>\n
                                                                                                                                                                                                              2. The septic tank<\/li>\n
                                                                                                                                                                                                              3. The distribution box<\/li>\n
                                                                                                                                                                                                              4. The house plumbing<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                              5. In which part of a sewerage system are aerobic bacteria mainly found?\n
                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                1. The field piping<\/li>\n
                                                                                                                                                                                                                2. The septic tank<\/li>\n
                                                                                                                                                                                                                3. The distribution box<\/li>\n
                                                                                                                                                                                                                4. The house plumbing<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                5. Which of the following indicates sewage strength and represents the total amount of oxygen, in mg\/L, used by microorganisms in decomposing one litre of organic matter in a 5-day period?\n
                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                  1. ASTTBC<\/li>\n
                                                                                                                                                                                                                  2. BOD5<\/sub><\/li>\n
                                                                                                                                                                                                                  3. SPM<\/li>\n
                                                                                                                                                                                                                  4. TSS<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                  5. Which of the following is not<\/em> included in the scope of the SSR?\n
                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                    1. Duplexes<\/li>\n
                                                                                                                                                                                                                    2. Single family dwellings<\/li>\n
                                                                                                                                                                                                                    3. 2 houses on a single parcel of land<\/li>\n
                                                                                                                                                                                                                    4. Houses discharging > 22700<\/span> litres\/day<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                    5. What does \u201careas used to receive effluent discharged from a treatment method\u201d describe?\n
                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                      1. Disposal areas<\/li>\n
                                                                                                                                                                                                                      2. Dispersal areas<\/li>\n
                                                                                                                                                                                                                      3. Discharge areas<\/li>\n
                                                                                                                                                                                                                      4. Displacement areas<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                      5. Which of the following is considered the most difficult and complex factor in choosing an appropriate dispersal method?\n
                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                        1. A soil analysis<\/li>\n
                                                                                                                                                                                                                        2. A cost analysis<\/li>\n
                                                                                                                                                                                                                        3. A property survey<\/li>\n
                                                                                                                                                                                                                        4. Equipment availability<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                                                                                                                                                                                                          Self-Test 2<\/h1>\n

                                                                                                                                                                                                                          Found in Competency D1, Learning Task 1<\/a><\/p>\n

                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                          \n

                                                                                                                                                                                                                          Self-Test 2<\/p>\n<\/header>\n

                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                          1. A septic tank, distribution box and dispersal field is known as what type of system?\n
                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                            1. Type 1<\/li>\n
                                                                                                                                                                                                                            2. Type 2<\/li>\n
                                                                                                                                                                                                                            3. Type 3<\/li>\n
                                                                                                                                                                                                                            4. Type 4<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                            5. All prefabricated septic tanks must be constructed to standards found in what document?\n
                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                              1. CAN\/CSA B149.1<\/li>\n
                                                                                                                                                                                                                              2. CAN\/CSA B66-00<\/li>\n
                                                                                                                                                                                                                              3. BC Plumbing Code<\/li>\n
                                                                                                                                                                                                                              4. National Plumbing Code of Canada<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                              5. Which one of the following choices is not<\/em> a \u201clayer\u201d associated with the contents of a septic tank?\n
                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                1. Scum<\/li>\n
                                                                                                                                                                                                                                2. Sludge<\/li>\n
                                                                                                                                                                                                                                3. Septics<\/li>\n
                                                                                                                                                                                                                                4. Effluent<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                5. What component is fitted to the baffle at the outlet of a septic tank that prevents large particles from leaving the tank and passing into the dispersal system?\n
                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                  1. A float switch<\/li>\n
                                                                                                                                                                                                                                  2. A screen<\/li>\n
                                                                                                                                                                                                                                  3. A sieve<\/li>\n
                                                                                                                                                                                                                                  4. A filter<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                  5. What is the term given to the act of flooding the dispersal field with a high flow rate of effluent from the primary treatment component?\n
                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                    1. Dosing<\/li>\n
                                                                                                                                                                                                                                    2. Saturation<\/li>\n
                                                                                                                                                                                                                                    3. Evacuation<\/li>\n
                                                                                                                                                                                                                                    4. Bombardment<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                    5. Aerobic treatment units (ATUs) produce effluent that is typically categorized as what type?\n
                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                      1. Type 1<\/li>\n
                                                                                                                                                                                                                                      2. Type 2<\/li>\n
                                                                                                                                                                                                                                      3. Type 3<\/li>\n
                                                                                                                                                                                                                                      4. Type 4<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                      5. Which one of the following choices would use a distribution box?\n
                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                        1. At Grade system<\/li>\n
                                                                                                                                                                                                                                        2. Pressure distribution<\/li>\n
                                                                                                                                                                                                                                        3. Alberta At Grade system<\/li>\n
                                                                                                                                                                                                                                        4. Trickling or gravity distribution<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                        5. What can be installed in the pipe outlets of a distribution box to ensure that the invert openings are all at the same elevation, thereby allowing equal flow to all the laterals?\n
                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                          1. Speed levelers<\/li>\n
                                                                                                                                                                                                                                          2. Quick openings<\/li>\n
                                                                                                                                                                                                                                          3. Pipe invert rotators<\/li>\n
                                                                                                                                                                                                                                          4. Elevation equalizers<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                          5. What component is fitted to both septic tanks and distribution boxes to allow easy entry and assist in periodic maintenance and inspection without the need for excavating?\n
                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                            1. Ladders<\/li>\n
                                                                                                                                                                                                                                            2. Access risers<\/li>\n
                                                                                                                                                                                                                                            3. Inspection ports<\/li>\n
                                                                                                                                                                                                                                            4. Egress openings<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                            5. What is the width of the bottom of a typical Type 1 distribution trench?\n
                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                              1. 12\u201318 inches<\/li>\n
                                                                                                                                                                                                                                              2. 15\u201330 inches<\/li>\n
                                                                                                                                                                                                                                              3. 18\u201336 inches<\/li>\n
                                                                                                                                                                                                                                              4. 48\u201384 inches<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                              5. What type of bacteria are at work in a dispersal system, that render the effluent harmless to people and the environment?\n
                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                1. E. coli<\/em><\/li>\n
                                                                                                                                                                                                                                                2. Aerobic<\/li>\n
                                                                                                                                                                                                                                                3. Anaerobic<\/li>\n
                                                                                                                                                                                                                                                4. Legionella<\/em><\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                5. Which type of dispersal system may suffer from plugging of the first few feet or metres of the laterals over time?\n
                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                  1. Subsurface distribution<\/li>\n
                                                                                                                                                                                                                                                  2. Pressure distribution<\/li>\n
                                                                                                                                                                                                                                                  3. Trickling<\/li>\n
                                                                                                                                                                                                                                                  4. Dosing<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                  5. What device turns a dosing pump on and off?\n
                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                    1. A float switch<\/li>\n
                                                                                                                                                                                                                                                    2. A manual switch<\/li>\n
                                                                                                                                                                                                                                                    3. A moisture meter<\/li>\n
                                                                                                                                                                                                                                                    4. In infrared scanner<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                    5. Which of the following types of dispersal systems would be well suited for smaller urban lots that may not have enough space for a conventional septic field?\n
                                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                                      1. Pressure distribution<\/li>\n
                                                                                                                                                                                                                                                      2. Trickling gravity<\/li>\n
                                                                                                                                                                                                                                                      3. Dosed gravity<\/li>\n
                                                                                                                                                                                                                                                      4. Lagoon<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                      5. Which type of system uses premanufactured plastic chambers for the dispersal of effluent?\n
                                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                                        1. At Grade<\/li>\n
                                                                                                                                                                                                                                                        2. Sand mound<\/li>\n
                                                                                                                                                                                                                                                        3. Gravelless Infiltrator\u00ae<\/li>\n
                                                                                                                                                                                                                                                        4. Subsurface drip dispersal<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                        5. What type of dispersal system uses a trench that is more than 90 cm but less than 3 m wide?\n
                                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                                          1. Trench<\/li>\n
                                                                                                                                                                                                                                                          2. Seepage bed<\/li>\n
                                                                                                                                                                                                                                                          3. Subsurface drip<\/li>\n
                                                                                                                                                                                                                                                          4. Pressure distribution<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                          5. What is the process known as whereby water is lost from small openings in the leaves of plants and grasses?\n
                                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                                            1. Respiration<\/li>\n
                                                                                                                                                                                                                                                            2. Perspiration<\/li>\n
                                                                                                                                                                                                                                                            3. Evaporation<\/li>\n
                                                                                                                                                                                                                                                            4. Transpiration<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                            5. Which of the following uses wood chips in its construction?\n
                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                              1. Gravity distribution<\/li>\n
                                                                                                                                                                                                                                                              2. Alberta At Grade<\/li>\n
                                                                                                                                                                                                                                                              3. ETA bed<\/li>\n
                                                                                                                                                                                                                                                              4. ET bed<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                              5. Which of the following systems must be fenced?\n
                                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                                1. ETA bed<\/li>\n
                                                                                                                                                                                                                                                                2. Alberta At Grade<\/li>\n
                                                                                                                                                                                                                                                                3. Pressure distribution<\/li>\n
                                                                                                                                                                                                                                                                4. BC Zero Discharge Lagoon<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                5. Which of the following is a system that treats and disperses wastewater in the same footprint?\n
                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                  1. ETA<\/li>\n
                                                                                                                                                                                                                                                                  2. HLR<\/li>\n
                                                                                                                                                                                                                                                                  3. CTDS<\/li>\n
                                                                                                                                                                                                                                                                  4. ROWP<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                                                                                                                                                                                                                                                    Self-Test 3<\/h1>\n

                                                                                                                                                                                                                                                                    Found in Competency D1, Learning Task 2<\/a><\/p>\n

                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                    \n

                                                                                                                                                                                                                                                                    Self-Test 3<\/p>\n<\/header>\n

                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                    1. Which one of the following processes separates silt and plastics from the wastewater?\n
                                                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                                                      1. Sludge treatment<\/li>\n
                                                                                                                                                                                                                                                                      2. Tertiary treatment<\/li>\n
                                                                                                                                                                                                                                                                      3. Primary treatment<\/li>\n
                                                                                                                                                                                                                                                                      4. Secondary treatment<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                      5. Which one of the following treatments uses biological processes that break down the organic waste by using nutrients provided in the raw sewage?\n
                                                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                                                        1. Sludge<\/li>\n
                                                                                                                                                                                                                                                                        2. Tertiary<\/li>\n
                                                                                                                                                                                                                                                                        3. Primary<\/li>\n
                                                                                                                                                                                                                                                                        4. Secondary<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                        5. Which one of the following choices represents a final process that municipal sewage may have to undergo to ensure that aquatic life in the final destination of the wastewater will not be harmed?\n
                                                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                                                          1. Chlorination<\/li>\n
                                                                                                                                                                                                                                                                          2. De-chlorination<\/li>\n
                                                                                                                                                                                                                                                                          3. UV Sterilization<\/li>\n
                                                                                                                                                                                                                                                                          4. Ozone disinfection<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                          5. Which one of the following processes uses anaerobic digesters, with the production of methane gas as a main by-product?\n
                                                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                                                            1. Sludge treatment<\/li>\n
                                                                                                                                                                                                                                                                            2. Tertiary treatment<\/li>\n
                                                                                                                                                                                                                                                                            3. Primary treatment<\/li>\n
                                                                                                                                                                                                                                                                            4. Secondary treatment<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                            5. What is the common destination for the waste sludge obtained through the processing of wastewater in a modern municipal sewage treatment plant?\n
                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                              1. A body of water<\/li>\n
                                                                                                                                                                                                                                                                              2. A sanitary landfill<\/li>\n
                                                                                                                                                                                                                                                                              3. A secondary clarifier<\/li>\n
                                                                                                                                                                                                                                                                              4. A tract of agricultural land<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                                                                                                                                                                                                                                                                Self-Test 4<\/h1>\n

                                                                                                                                                                                                                                                                                Found in Competency D1, Learning Task 3<\/a><\/p>\n

                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                                \n

                                                                                                                                                                                                                                                                                Self-Test 4<\/p>\n<\/header>\n

                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                                                1. What is the first step in the planning process for the installation of a residential onsite sewage treatment system?\n
                                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                                  1. Perform a soils analysis<\/li>\n
                                                                                                                                                                                                                                                                                  2. Select a dispersal method<\/li>\n
                                                                                                                                                                                                                                                                                  3. Select the treatment method<\/li>\n
                                                                                                                                                                                                                                                                                  4. Gather information from the owner<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                  5. What is the term used that defines the estimated peak flow that will be discharged to the septic system and for which the system is designed?\n
                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                    1. Sewage output<\/li>\n
                                                                                                                                                                                                                                                                                    2. Daily design flow<\/li>\n
                                                                                                                                                                                                                                                                                    3. Weekly wastewater<\/li>\n
                                                                                                                                                                                                                                                                                    4. Yearly flow average<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                    5. Refer to Table II-8. What would be the DDF for a residence that has 4 bedrooms and a living area of 345 m2<\/sup>?\n
                                                                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                                                                      1. 1300<\/span> litres\/day<\/li>\n
                                                                                                                                                                                                                                                                                      2. 1345<\/span> litres\/day<\/li>\n
                                                                                                                                                                                                                                                                                      3. 1600<\/span> litres\/day<\/li>\n
                                                                                                                                                                                                                                                                                      4. 1645<\/span> litres\/day<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                      5. What is to be the increase in the DDF if a garbage grinder or garburator is used?\n
                                                                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                                                                        1. 50%<\/li>\n
                                                                                                                                                                                                                                                                                        2. 40%<\/li>\n
                                                                                                                                                                                                                                                                                        3. 30%<\/li>\n
                                                                                                                                                                                                                                                                                        4. 5%<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                        5. Refer to Table II-9. What would be the DDF for a seasonal cottage with 3 bedrooms?\n
                                                                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                                                                          1. 1312.5<\/span> litres\/day<\/li>\n
                                                                                                                                                                                                                                                                                          2. 1300<\/span> litres\/day<\/li>\n
                                                                                                                                                                                                                                                                                          3. 937.5 litres\/day<\/li>\n
                                                                                                                                                                                                                                                                                          4. 750 litres\/day<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                          5. Arrange the following criteria in the proper order:\n
                                                                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                                                                            1. Determine the DDF<\/li>\n
                                                                                                                                                                                                                                                                                            2. Meet with the owner<\/li>\n
                                                                                                                                                                                                                                                                                            3. Select the dispersal method<\/li>\n
                                                                                                                                                                                                                                                                                            4. Select the treatment method<\/li>\n<\/ol>\n

                                                                                                                                                                                                                                                                                               <\/p>\n

                                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                                              1. 2, 1, 3, 4<\/li>\n
                                                                                                                                                                                                                                                                                              2. 4, 3, 2, 1<\/li>\n
                                                                                                                                                                                                                                                                                              3. 2, 1, 4, 3<\/li>\n
                                                                                                                                                                                                                                                                                              4. 3, 4, 2, 1<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                              5. What term defines the measure of the volume of effluent, in litres, applied each day, per unit area (m2<\/sup>) of infiltrative surface?\n
                                                                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                                                                1. Area of infiltrative surface<\/li>\n
                                                                                                                                                                                                                                                                                                2. Hydraulic loading rate<\/li>\n
                                                                                                                                                                                                                                                                                                3. Vertical separation<\/li>\n
                                                                                                                                                                                                                                                                                                4. Restrictive layer<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                5. What term defines a layer of soil, rock, hardpan, glacial rock and unstructured clay soils?\n
                                                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                                                  1. Limiting layer<\/li>\n
                                                                                                                                                                                                                                                                                                  2. Blinding layer<\/li>\n
                                                                                                                                                                                                                                                                                                  3. Restrictive layer<\/li>\n
                                                                                                                                                                                                                                                                                                  4. Vertical separation<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                  5. What term defines the depth of unsaturated, original, undisturbed permeable soil below the infiltrative surface and above any limiting layer?\n
                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                    1. Soil horizon<\/li>\n
                                                                                                                                                                                                                                                                                                    2. Blinding layer<\/li>\n
                                                                                                                                                                                                                                                                                                    3. Infiltrative surface<\/li>\n
                                                                                                                                                                                                                                                                                                    4. Vertical separation<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                    5. What term defines the layers of soil approximately parallel to the land surface and different from adjacent layers in physical, chemical and biological properties?\n
                                                                                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                                                                                      1. Soil horizon<\/li>\n
                                                                                                                                                                                                                                                                                                      2. Limiting layer<\/li>\n
                                                                                                                                                                                                                                                                                                      3. Blinding layer<\/li>\n
                                                                                                                                                                                                                                                                                                      4. Vertical separation<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                      5. What term defines a layer of clean coarse sand or mound sand that is installed between the infiltrative surface and the native soil, and which is up to 10 cm (4 in.) thick?\n
                                                                                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                                                                                        1. Limiting layer<\/li>\n
                                                                                                                                                                                                                                                                                                        2. Blinding layer<\/li>\n
                                                                                                                                                                                                                                                                                                        3. Restrictive layer<\/li>\n
                                                                                                                                                                                                                                                                                                        4. Vertical separation<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                        5. Why is heavy clay not favourable for a disposal field?\n
                                                                                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                                                                                          1. Clay is too hard to dig through<\/li>\n
                                                                                                                                                                                                                                                                                                          2. The clay will block flow through it<\/li>\n
                                                                                                                                                                                                                                                                                                          3. The clay will allow too much flow through it<\/li>\n
                                                                                                                                                                                                                                                                                                          4. The clay will stick to tools when trying to excavate<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                          5. Why is coarse, grainy soil, such as gravel or sand, not favourable for a disposal field?\n
                                                                                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                                                                                            1. Flow through it will be too fast<\/li>\n
                                                                                                                                                                                                                                                                                                            2. Flow through it will be too slow<\/li>\n
                                                                                                                                                                                                                                                                                                            3. There will be no flow through it<\/li>\n
                                                                                                                                                                                                                                                                                                            4. Sand and gravel will compact too much<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                            5. If \u201cNA\u201d is encountered in any of the tables for determining soil conditions for a conventional trench system, what is the expected outcome?\n
                                                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                                                              1. Use a seepage bed system<\/li>\n
                                                                                                                                                                                                                                                                                                              2. Double the length of the field piping<\/li>\n
                                                                                                                                                                                                                                                                                                              3. Use an above grade system or a lagoon<\/li>\n
                                                                                                                                                                                                                                                                                                              4. The soil cannot support the use of any type of dispersal system<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                              5. What is the expression of the flow rate associated with a percolation test?\n
                                                                                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                                                                                1. Minutes per inch<\/li>\n
                                                                                                                                                                                                                                                                                                                2. Minutes per foot<\/li>\n
                                                                                                                                                                                                                                                                                                                3. Hours per inch<\/li>\n
                                                                                                                                                                                                                                                                                                                4. Hours per foot<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                5. Which table from the SPM will determine whether a gravity distribution system is allowed or not allowed?\n
                                                                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                                                                  1. Table II-5<\/li>\n
                                                                                                                                                                                                                                                                                                                  2. Table II-6<\/li>\n
                                                                                                                                                                                                                                                                                                                  3. Table II-7<\/li>\n
                                                                                                                                                                                                                                                                                                                  4. Table II-21<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                  5. If soil constraints disallow the use of a gravity or dosed gravity distribution system, which table would provide guidance as to other options for dispersal?\n
                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                    1. Table II-5<\/li>\n
                                                                                                                                                                                                                                                                                                                    2. Table II-6<\/li>\n
                                                                                                                                                                                                                                                                                                                    3. Table II-7<\/li>\n
                                                                                                                                                                                                                                                                                                                    4. Table II-21<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                    5. Which of the following determines the length of trenches needed for a dispersal field?\n
                                                                                                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                                                                                                      1. AIS divided by trench width<\/li>\n
                                                                                                                                                                                                                                                                                                                      2. DDS divided by perc rate<\/li>\n
                                                                                                                                                                                                                                                                                                                      3. HLR multiplied by DDF<\/li>\n
                                                                                                                                                                                                                                                                                                                      4. DDS divided by HLR<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                      5. What is meant by a \u201cseparation layer\u201d in a distribution trench?\n
                                                                                                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                                                                                                        1. A layer of sand over the gravel<\/li>\n
                                                                                                                                                                                                                                                                                                                        2. The cover soil layer over the pipe<\/li>\n
                                                                                                                                                                                                                                                                                                                        3. The gravel over the unsaturated soil<\/li>\n
                                                                                                                                                                                                                                                                                                                        4. Lightweight, non-woven geotextile over the gravel<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                        5. What is the suggested minimum distance between laterals in a typical trench installation?\n
                                                                                                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                                                                                                          1. 3 m<\/li>\n
                                                                                                                                                                                                                                                                                                                          2. 1.8 m<\/li>\n
                                                                                                                                                                                                                                                                                                                          3. 1 m<\/li>\n
                                                                                                                                                                                                                                                                                                                          4. 90 cm<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                          5. What is the suggested depth of gravel below a lateral in a trench?\n
                                                                                                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                                                                                                            1. No more than 5 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                            2. More than 15 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                            3. More than 90 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                            4. At least 1.8 m<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                            5. What is the suggested minimum depth of cover soil over a trench?\n
                                                                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                                                                              1. 5 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                              2. 15 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                              3. 90 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                              4. 1.8 m<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                              5. What is suggested to be installed at the base of an observation port, to prevent pullout?\n
                                                                                                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                                                                                                1. Nothing<\/li>\n
                                                                                                                                                                                                                                                                                                                                2. A coupling<\/li>\n
                                                                                                                                                                                                                                                                                                                                3. A pipe plug<\/li>\n
                                                                                                                                                                                                                                                                                                                                4. A toilet flange<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                5. What is the suggested maximum width of a trench bottom?\n
                                                                                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                                                                                  1. 15 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                                  2. 60 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                                  3. 90 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                                  4. 1.8 m<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                  5. What are the suggested sizes of pipe for the observation ports?\n
                                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                                    1. 2\u2033 or 3\u2033<\/li>\n
                                                                                                                                                                                                                                                                                                                                    2. 3\u2033 or 4\u2033<\/li>\n
                                                                                                                                                                                                                                                                                                                                    3. 4\u2033 or 6\u2033<\/li>\n
                                                                                                                                                                                                                                                                                                                                    4. 6\u2033 or 8\u2033<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                                                                                                                                                                                                                                                                                                                      Self-Test 5<\/h1>\n

                                                                                                                                                                                                                                                                                                                                      Found in Competency D1, Learning Task 3<\/a><\/p>\n

                                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                                      \n

                                                                                                                                                                                                                                                                                                                                      Self-Test 5<\/p>\n<\/header>\n

                                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                                                                                                                      1. Which of the following is not<\/em> a contributor to good septic tank performance?\n
                                                                                                                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                                                                                                                        1. Larger surface area<\/li>\n
                                                                                                                                                                                                                                                                                                                                        2. Shorter distance between inlet and outlet pipes<\/li>\n
                                                                                                                                                                                                                                                                                                                                        3. Longer distance between inlet and outlet pipes<\/li>\n
                                                                                                                                                                                                                                                                                                                                        4. Smaller, letterbox-sized openings between the first and second compartment<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                        5. What type of desired flow through a septic tank is achieved using an inlet baffle?\n
                                                                                                                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                                                                                                                          1. Violent<\/li>\n
                                                                                                                                                                                                                                                                                                                                          2. Turbulent<\/li>\n
                                                                                                                                                                                                                                                                                                                                          3. Quiescent<\/li>\n
                                                                                                                                                                                                                                                                                                                                          4. Excessive<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                          5. What would be the minimum working volume of a septic tank if the DDF was not > 9100<\/span> litres\/day?\n
                                                                                                                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                                                                                                                            1. 1000<\/span> litres<\/li>\n
                                                                                                                                                                                                                                                                                                                                            2. 1500<\/span> litres<\/li>\n
                                                                                                                                                                                                                                                                                                                                            3. 15000<\/span> litres<\/li>\n
                                                                                                                                                                                                                                                                                                                                            4. 3 times the DDF<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                            5. For 2-compartment tanks, or 2 tanks in series, what does the SPM specify as to the volume of the first tank or compartment?\n
                                                                                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                                                                                              1. 100% to 75% of the total working volume<\/li>\n
                                                                                                                                                                                                                                                                                                                                              2. 75% to 50% of the total working volume<\/li>\n
                                                                                                                                                                                                                                                                                                                                              3. 67% to 50% of the total working volume<\/li>\n
                                                                                                                                                                                                                                                                                                                                              4. 50% to 25% of the total working volume<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                              5. What is the minimum suggested interval between pumpouts for a septic tank?\n
                                                                                                                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                                                                                                                1. 1 year<\/li>\n
                                                                                                                                                                                                                                                                                                                                                2. 2 years<\/li>\n
                                                                                                                                                                                                                                                                                                                                                3. 3 years<\/li>\n
                                                                                                                                                                                                                                                                                                                                                4. 5 years<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                5. Which of the following is not<\/em> listed as a reason for the use of a larger tank rather than one of minimum size?\n
                                                                                                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                                                                                                  1. Lower cost of pumpouts over time<\/li>\n
                                                                                                                                                                                                                                                                                                                                                  2. Improved oil and grease separation<\/li>\n
                                                                                                                                                                                                                                                                                                                                                  3. Improved suspended solids removal<\/li>\n
                                                                                                                                                                                                                                                                                                                                                  4. Increased intervals between pumpouts<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                  5. What is the minimum grade allowable, by most plumbing codes, for a 4-inch building sewer?\n
                                                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                                                    1. [latex]\\frac{1}{16}''\/\\text{ft }\\left(\\frac{1}{200}\\right)[\/latex]<\/li>\n
                                                                                                                                                                                                                                                                                                                                                    2. [latex]\\frac{1}{8}''\/\\text{ft }\\left(\\frac{1}{100}\\right)[\/latex]<\/li>\n
                                                                                                                                                                                                                                                                                                                                                    3. [latex]\\frac{1}{4}''\/\\text{ft }\\left(\\frac{1}{50}\\right)[\/latex]<\/li>\n
                                                                                                                                                                                                                                                                                                                                                    4. [latex]\\frac{1}{2}''\/\\text{ft }\\left(\\frac{1}{25}\\right)[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                    5. How is mandatory venting of a septic tank normally achieved?\n
                                                                                                                                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                                                                                                                                      1. By a 2-inch vent at the bottom of the tank<\/li>\n
                                                                                                                                                                                                                                                                                                                                                      2. By a 4-inch vent at the top of the tank<\/li>\n
                                                                                                                                                                                                                                                                                                                                                      3. Through a vent in the dispersal field<\/li>\n
                                                                                                                                                                                                                                                                                                                                                      4. Through the building sewer<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                      5. What are access \u201ctunnels\u201d from ground level to the septic tank known as?\n
                                                                                                                                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                                                                                                                                        1. Drops<\/li>\n
                                                                                                                                                                                                                                                                                                                                                        2. Risers<\/li>\n
                                                                                                                                                                                                                                                                                                                                                        3. Vaults<\/li>\n
                                                                                                                                                                                                                                                                                                                                                        4. Chambers<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                        5. Within what distance from risers or access lids should components that may need to be periodically checked or maintained be?\n
                                                                                                                                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                                                                                                                                          1. 5 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                                                          2. 15 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                                                          3. 90 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                                                          4. 1 m<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                          5. What is the suggested minimum internal diameter of a riser that is not over 90 cm long?\n
                                                                                                                                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                                                                                                                                            1. 15 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                                                            2. 50 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                                                            3. 76 cm<\/li>\n
                                                                                                                                                                                                                                                                                                                                                            4. 90 cm<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                            5. What is the minimum horizontal separation distance from a septic tank to a domestic water supply well?\n
                                                                                                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                                                                                                              1. 25 ft (7.5 m)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                              2. 50 ft (15 m)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                              3. 100 ft (30 m)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                              4. 200 ft (60 m)<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                              5. What is the minimum horizontal separation distance from a dispersal system to a drinking water line that is under pressure?\n
                                                                                                                                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                                                                                                                                1. 3 ft (0.9 m)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                2. 10 ft (3 m)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                3. 25 ft (7.5 m)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                4. 50 ft (15 m)<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                5. What is the minimum horizontal separation distance between a dispersal system and a lake?\n
                                                                                                                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                                                                                                                  1. 33 ft (10 m)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                  2. 50 ft (15 m)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                  3. 100 ft (30 m)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                  4. 200 ft (60 m)<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                  5. What is the minimum horizontal separation distance between a septic tank and a dispersal field lateral?\n
                                                                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                                                                    1. 0.9 metres (3 feet)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                    2. 1.5 metres (5 feet)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                    3. 1.8 metres (6 feet)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                    4. 3 metres (10 feet)<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                                                                                                                                                                                                                                                                                                                                                      Self-Test 1<\/h1>\n

                                                                                                                                                                                                                                                                                                                                                                      Found in Competency D2, Learning Task 4<\/a><\/p>\n

                                                                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                                                                      \n

                                                                                                                                                                                                                                                                                                                                                                      Self-Test 1<\/p>\n<\/header>\n

                                                                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                                                                                                                                                      1. If, during a water test of a tank, a loss of 10 litres of water was reflected in the water level in the riser dropping 3.5 cm, what size would the riser be?\n
                                                                                                                                                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                                                                                                                                                        1. 46 cm (18 in.)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                        2. 61 cm (24 in.)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                        3. 76 cm (30 in.)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                        4. 91 cm (36 in.)<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                        5. If a vacuum test is used instead of a water test, what is the expected loss of vacuum within the first 5 minutes?\n
                                                                                                                                                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                                                                                                                                                          1. \u00bd inch of mercury<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                          2. 1 inch of mercury<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                          3. \u00bd inch of water column<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                          4. 1 inch of water column<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                          5. A dosed gravity distribution system should have at least how much of its volume filled on every dose?\n
                                                                                                                                                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                                                                                                                                                            1. 50%<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                            2. 67%<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                            3. 75%<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                            4. 100%<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                            5. To what minimum height should the water columns in a squirt test rise if the orifices are 4.2 mm [latex]\\left(\\frac{11}{64}''\\right)[\/latex] in diameter?\n
                                                                                                                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                                                                                                                              1. 60 cm (24 in.)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                              2. 90 cm (36 in.)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                              3. 120 cm (48 in.)<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                              4. 150 cm (60 in.)<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                              5. Which of the following must an AP check for during the first 12\u201314 months of operation of a Type 1 sewerage system?\n
                                                                                                                                                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                                                                                                                                                1. Fecal coliforms<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                2. BOD5<\/sub> and TSS<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                3. Sludge level<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                4. Flow<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                5. According to the information in Table III-35, what is the suggested pump out frequency for a 4500<\/span> litre (1000<\/span> Imp. Gal.) septic tank that serves a household occupancy of 4 people?\n
                                                                                                                                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                                                                                                                                  1. 3.7 years<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                  2. 5.2 years<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                  3. 6.8 years<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                  4. 8 years<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                  5. What is the black, jelly-like permeable layer that forms in the soil in the drain field\u2019s trenches known as?\n
                                                                                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                                                                                    1. Biomat<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                    2. Effluent<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                    3. Field tar<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                    4. Septic jelly<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                    5. What effect does the formation of the substance in the previous question have on the flow rate and filtration of viruses and pathogens in the wastewater?\n
                                                                                                                                                                                                                                                                                                                                                                                        \n
                                                                                                                                                                                                                                                                                                                                                                                      1. It slows the flow and cuts filtration time down<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                      2. It speeds the flow and cuts filtration time down<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                      3. It slows the flow and gives more time for filtration<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                      4. It speeds the flow and gives more time for filtration<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                      5. Which of the following would not<\/em> be a contributor to maintaining a healthy septic field?\n
                                                                                                                                                                                                                                                                                                                                                                                          \n
                                                                                                                                                                                                                                                                                                                                                                                        1. Perform routine maintenance<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                        2. Avoid hydraulic overload<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                        3. Flush bleach periodically<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                        4. Maintain filters<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                        5. Which of the following choices is not<\/em> listed as a common issue with a malfunctioning septic system?\n
                                                                                                                                                                                                                                                                                                                                                                                            \n
                                                                                                                                                                                                                                                                                                                                                                                          1. \u201cPonding\u201d<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                          2. Slow fixture drainage<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                          3. Contaminated drinking water<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                          4. Frequent dosing pump failure<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                          5. What causes the corrosion of a concrete septic tank at points at and above the waterline?\n
                                                                                                                                                                                                                                                                                                                                                                                              \n
                                                                                                                                                                                                                                                                                                                                                                                            1. The formation of scum<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                            2. The formation of sludge<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                            3. The formation of effluent<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                            4. The formation of hydrochloric acid<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                            5. Fusion (heat) welding can be a repair used on what type of permanent tank?\n
                                                                                                                                                                                                                                                                                                                                                                                                \n
                                                                                                                                                                                                                                                                                                                                                                                              1. Polyethylene<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                              2. Fiberglass<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                              3. Concrete<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                              4. Steel<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                              5. Why would plastic and fibreglass tanks always need confined space entry procedures followed, whereas concrete tanks may not?\n
                                                                                                                                                                                                                                                                                                                                                                                                  \n
                                                                                                                                                                                                                                                                                                                                                                                                1. Concrete tanks normally have larger volumes<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                2. Fibreglass tanks don\u2019t have harmful atmospheres<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                3. Plastic and fibreglass tanks don\u2019t have removeable lids<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                4. Plastic tanks are usually removed for periodic inspections<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                5. Why are damaged distribution boxes replaced rather than repaired?\n
                                                                                                                                                                                                                                                                                                                                                                                                    \n
                                                                                                                                                                                                                                                                                                                                                                                                  1. Their repair isn\u2019t possible<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                  2. The SPM mandates replacement<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                  3. Their cost and size are relatively small<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                  4. If they are damaged, it is because of their age<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                  5. What is the process known as, whereby biological (not chemical) additives are introduced into the system to consume excessive biomat that may be clogging the system drainfield piping?\n
                                                                                                                                                                                                                                                                                                                                                                                                      \n
                                                                                                                                                                                                                                                                                                                                                                                                    1. Jolting the system<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                    2. Shocking the system<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                    3. Cleaning the system<\/li>\n
                                                                                                                                                                                                                                                                                                                                                                                                    4. Eating up the system<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n","protected":false},"author":125,"menu_order":1,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"back-matter-type":[],"contributor":[],"license":[],"class_list":["post-289","back-matter","type-back-matter","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/pressbooks\/v2\/back-matter\/289","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/pressbooks\/v2\/back-matter"}],"about":[{"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/wp\/v2\/types\/back-matter"}],"author":[{"embeddable":true,"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/wp\/v2\/users\/125"}],"version-history":[{"count":7,"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/pressbooks\/v2\/back-matter\/289\/revisions"}],"predecessor-version":[{"id":362,"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/pressbooks\/v2\/back-matter\/289\/revisions\/362"}],"metadata":[{"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/pressbooks\/v2\/back-matter\/289\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/wp\/v2\/media?parent=289"}],"wp:term":[{"taxonomy":"back-matter-type","embeddable":true,"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/pressbooks\/v2\/back-matter-type?post=289"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/wp\/v2\/contributor?post=289"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/opentextbc.ca\/plumbing4d\/wp-json\/wp\/v2\/license?post=289"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}