Competency D1

Self-Test 1

1. c. Holding tanks and privies
2. a. A plumber
3. c. Private Inspector
4. d. Recreational
5. b. The septic tank
6. a. The field piping
7. b. BOD5
8. d. Houses discharging > 22700 litres/day
9. b. Dispersal area
10. a. A soil analysis

Self-Test 2

1. a. Type 1
2. b. CAN/CSA B66-00
3. c. Septics
4. d. A filter
5. a. Dosing
6. b. Type 2
7. d. Trickling or gravity distribution
8. a. Speed levelers
9. b. Access risers
10. c. 18-36 inches
11. b. Aerobic
12. c. Trickling
13. a. A float switch
14. a. Pressure distribution
15. c. Gravelless Infiltrator®
16. b. Seepage bed
17. d. Transpiration
18. b. Alberta At Grade
19. d. BC Zero Discharge Lagoon
20. c. CTDS

Self-Test 3

1. c. Primary treatment
2. d. Secondary
3. b. De-chlorination
4. a. Sludge treatment
5. b. A sanitary landfill

Self-Test 4

1. d. Gather information from the owner
2. b. Daily design flow
3. d. 1645 litres/day
4. a. 50%
5. c. 937.5 litres/day
6. a. 2, 1, 3, 4
7. b. Hydraulic loading rate
8. c. Restrictive layer
9. d. Vertical separation
10. a. Soil horizon
11. b. Blinding layer
12. b. The clay will block flow through it
13. a. Flow through it will be too fast
14. c. Use an above grade system or a lagoon
15. a. Minutes per inch
16. a. Table II-5
17. c. Table II-7
18. a. AIS divided by trench width
19. d. Lightweight, non-woven geotextile over the gravel
20. b. 1.8 m
21. b. More than 15 cm
22. b. 15 cm
23. d. A toilet flange
24. c. 90 cm
25. c. 4” or 6”

Self-Test 5

1. b. Shorter distance between inlet and outlet pipes
2. c. Quiescent
3. d. 3 times the DDF
4. b. 75% to 50% of the total working volume
5. d. 5 years
6. a. Lower cost of pumpouts over time
7. b. [latex]\tfrac{1}{8}[/latex]”/ft ([latex]\tfrac{1}{100}[/latex])
8. d. Through the building sewer
9. b. Risers
10. b. 15 cm
11. b. 50 cm
12. c. 100 feet (30 m)
13. b. 10 feet (3 m)
14. c. 100 feet (30 m)
15. d. 3 metres (10 feet)

Competency D2

Self-Test 6

1. b. 61 cm (24 inches)
2. a. ½ inch of mercury
3. b. 67%
4. d. 150 cm (60 inches)
5. d. Flow
6. d. 8 years
7. a. Biomat
8. c. It slows the flow and gives more time for filtration
9. c. Flush bleach periodically
10. d. Frequent dosing pump failure
11. d. The formation of hydrochloric acid
12. a. Polyethylene
13. c. Plastic tanks don’t have removeable lids
14. c. Their cost and size are relatively small
15. b. Shocking the system