{"id":229,"date":"2022-04-27T19:57:37","date_gmt":"2022-04-27T23:57:37","guid":{"rendered":"https:\/\/opentextbc.ca\/plumbing3f\/back-matter\/self-test-answer-keys\/"},"modified":"2022-04-27T19:57:37","modified_gmt":"2022-04-27T23:57:37","slug":"self-test-answer-keys","status":"publish","type":"back-matter","link":"https:\/\/opentextbc.ca\/plumbing3f\/back-matter\/self-test-answer-keys\/","title":{"raw":"Appendix 1: Self-Test Answer Keys","rendered":"Appendix 1: Self-Test Answer Keys"},"content":{"raw":"

Competency F1<\/h1>\n

Self Test 1<\/h2>\n
    \n \t
  1. b. Respiration<\/li>\n \t
  2. a. 48<\/li>\n \t
  3. d. \u201cCold 70\u201d<\/li>\n \t
  4. b. The ideal heat curve<\/li>\n \t
  5. c. The intensity of heat present<\/li>\n \t
  6. a. Mass (weight in pounds) \u00d7 \u0394T (in degrees F) \u00d7 S.H. (specific heat)<\/li>\n \t
  7. c. 20\u00b0F<\/li>\n \t
  8. d. 140\u00b0F<\/li>\n \t
  9. a. Zoning<\/li>\n \t
  10. d. 0.045 (1 \u00f7 22)<\/li>\n \t
  11. a. 704150 ft\u00b2 \u00d7 (1 \u00f7 14) \u00d7 (72 \u2013 5) = 150 \u00d7 0.07 \u00d7 67 = 703.5 (round to 704)<\/li>\n \t
  12. d. The outdoor design temperature<\/li>\n \t
  13. d. 68\u00b0F<\/li>\n \t
  14. b. 18\u00b0C (64\u00b0F)<\/li>\n \t
  15. d. Transmission<\/li>\n \t
  16. b. Infiltration<\/li>\n \t
  17. a. 0.04\nOutside air film = 0.17;\n4\u2033 brick = 0.44; \u00bd\u2033 plywood sheathing = 0.63;\nFG insulation = 3.72 \u00d7 5.5\u2033 = 20.46;\nvapour barrier = 0; \u00bd\u2033 GWB = 0.45;\ninside air film = 0.68\nAggregate \u201cR\u201d value = 22.83 \u201cU\u201d value = 1 \u00f7 22.83 = 0.04<\/li>\n \t
  18. d. Low \u201cE\u201d \u2013 argon-filled<\/li>\n \t
  19. c. Thermal bridging<\/li>\n \t
  20. b. 1,930 BTUH(20 \u00d7 15 \u00d7 8) ft\u00b3 \u00d7 (2\/3 ACH \u00d7 0.018) \u00d7 (72 \u2013 5) = 2400 \u00d7 0.012 \u00d7 67 = 1,930 BTUH<\/li>\n \t
  21. c. The rate would double<\/li>\n \t
  22. a. The rate would be halved<\/li>\n \t
  23. d. The ODT for the two houses will be different.<\/li>\n \t
  24. c. 1 ACH<\/li>\n \t
  25. b. 0.06<\/li>\n \t
  26. a. 15.0(3 \u00d7 5.0\/inch)<\/li>\n \t
  27. a. 1\/3 ACH<\/li>\n \t
  28. c. 22\u00b0F<\/li>\n \t
  29. Windows: (2) \u00d7 3\u2032 \u00d7 5\u2032 \u00d7 0.59 \u00d7 (72 - -16) = 1,558 BTUH\nNet walls: ((11 \u00d7 8) + (12 \u00d7 8)) \u2013 30 = 154 ft\u00b2\n154 \u00d7 0.05 \u00d7 88 = 678 BTUH\nCeiling: (12\u2032 \u00d7 11\u2032) \u00d7 0.03 \u00d7 88 = 348 BTUH\nFloor: (12\u2032 \u00d7 11\u2032) \u00d7 0.05 \u00d7 88 = 581 BTUH\nInfiltration: (12\u2032 \u00d7 11\u2032 \u00d7 8\u2032) \u00d7 (2\/3 \u00d7 0.018) \u00d7 88 = 1,115 BTUH\nTotal heat loss: 4,280 BTUH<\/li>\n \t
  30. a. 1,164 BTUH(17.5\u2032 \u00d7 33.25\u2032) \u00d7 0.04 \u00d7 (65 \u2013 15) = 1,164 BTUH<\/li>\n<\/ol>\n

    Competency F2<\/h1>\n

    Self Test 2<\/h2>\n
      \n \t
    1. a. PeX \u201cA\u201d<\/li>\n \t
    2. d. all varieties need oxygen-barrier, whether in wet or dry systems<\/li>\n \t
    3. c. 2 \u00bd\u2033 polystyrene<\/li>\n \t
    4. a. in the ceiling below<\/li>\n \t
    5. a. to give the wall more stability<\/li>\n \t
    6. c. a heat exchanger<\/li>\n \t
    7. b. dry systems<\/li>\n \t
    8. a. reflective foil<\/li>\n \t
    9. b. they operate at low temperatures is a false statement<\/li>\n \t
    10. c. make a first pass 6 inches from the outside walls, then turn 180\u00b0 with another 6-inch pass, then resume normal loop layout<\/li>\n \t
    11. b. 9\u2033 o.c. from Table (2.2A?)<\/li>\n \t
    12. c. 40 btuh\/ft\u00b2<\/li>\n \t
    13. b. 300 feet is the norm although there may be some manufacturers who differ<\/li>\n \t
    14. d. 200 ft\u00b2 - 84.5 ft\u00b2 = 115.5 ft\u00b2 of available area. 3050 btuh \u00f7 115.5 ft\u00b2 = 26.41 btuh\/ft\u00b2 of floor output. From Table (2.2A?), this is 9\u2033 o.c. tube spacing. 115.5 \u00d7 1.3 (tube spacing factor for 9\u2033 o.c.) = 150 feet of tubing<\/li>\n \t
    15. b. infra-red thermometer<\/li>\n \t
    16. c. 2:1<\/li>\n \t
    17. b. 100 psi for 30 minutes<\/li>\n \t
    18. b. its output<\/li>\n \t
    19. a. the single circuit with the highest head loss served by the pump<\/li>\n \t
    20. c. flow rate and feet of head<\/li>\n \t
    21. b. #4<\/li>\n \t
    22. a. 19.2 GPM\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 48,000 \u00f7 (5 \u00d7 60 \u00d7 8.33)<\/li>\n \t
    23. d. 12,000\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12 inches \u00d7 1,000 millinches\/inch<\/li>\n \t
    24. d. 9 feet of head\u00a0\u00a0\u00a0 180 measured feet \u00d7 1.5 (fitting allowance) = 270 equivalent feet. Under the 400 millinch column, 270 equivalent feet = 9 ft. head<\/li>\n \t
    25. c. globe<\/li>\n \t
    26. a. reset control<\/li>\n \t
    27. c. hydraulic separation<\/li>\n \t
    28. b. its inner plate surface area<\/li>\n \t
    29. c. 3.12 feet of head\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 37,000 btuh \u00f7 10,000 btuh\/USGPM = 3.7 GPM\n(3.7 \u00f7 3.2)\u00b2 = 1.156\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1.156\u00b2 = 1.3369 psi\n1.3369 psi \u00d7 2.31 ft hd\/psi = 3.088 (3.09) feet head<\/li>\n \t
    30. c. a differential bypass valve<\/li>\n \t
    31. a. flow rate<\/li>\n \t
    32. a. 17.56\u00a0\u00a0\u00a0\u00a0 29 feet \u00d7 .433 psi\/ft = 12.56\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.56 + 5 = 17.56 psi<\/li>\n \t
    33. c. 2.02 USG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (45,000 \u00f7 59,500) \u00d7 2 gal = 1.51 USG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1.51 \u00d7 1.34 (temp. adj.) = 2.02<\/li>\n \t
    34. a. boiler operation<\/li>\n \t
    35. c. 1 \u00bc\u2033\u00a0 \u00a0 \u00a0 \u00a065,000 BTUH on Table 2.8\u00a0= 1 \u00bc\u2033 pipe<\/li>\n<\/ol>\n

      Competency F3<\/h1>\n

      Self Test 3<\/h2>\n
        \n \t
      1. d. a pole<\/li>\n \t
      2. c. a throw<\/li>\n \t
      3. a. by their number of poles and throws<\/li>\n \t
      4. c. a momentary switch<\/li>\n \t
      5. b. open on rise<\/li>\n \t
      6. d. aquastats<\/li>\n \t
      7. c. a pressure switch<\/li>\n \t
      8. d. an end switch<\/li>\n \t
      9. b. 24V AC<\/li>\n \t
      10. b. 24V AC<\/li>\n \t
      11. b. the hot leg<\/li>\n \t
      12. d. EMR<\/li>\n \t
      13. b. 24V AC<\/li>\n \t
      14. d. 120V AC<\/li>\n \t
      15. c. when the coil is energized, the contact positions will reverse<\/li>\n \t
      16. d. a SPDT switch<\/li>\n \t
      17. b. a low water cutoff<\/li>\n \t
      18. c. a DPDT switch<\/li>\n \t
      19. c. a pressure switch<\/li>\n \t
      20. d. an SSR<\/li>\n<\/ol>\n

        Competency F4<\/h1>\n

        Self Test 4<\/h2>\n
          \n \t
        1. d. lowering the aquastat setting on a non-condensing boiler<\/li>\n \t
        2. b. a secondary heat exchanger<\/li>\n \t
        3. c. hydraulic separation<\/li>\n \t
        4. c. 4 diameters apart<\/li>\n \t
        5. c. 10,000\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8.33 lbs\/USG x 60 min\/hr x 20\u00b0F\u0394T<\/li>\n \t
        6. a. an end switch<\/li>\n \t
        7. b. cold start<\/li>\n \t
        8. d. the lines that represent wires won\u2019t cross each other<\/li>\n \t
        9. c. on the face of the transformer<\/li>\n \t
        10. a. \u201cC\u201d<\/li>\n \t
        11. b. \u201cR\u201d<\/li>\n \t
        12. d. \u201cY\u201d and \u201cW\u201d<\/li>\n \t
        13. a. at the mixing point<\/li>\n \t
        14. b. in the boiler return piping<\/li>\n \t
        15. c. a diverting valve has less head loss than a mixing valve<\/li>\n \t
        16. a. it needs a remote sensor<\/li>\n \t
        17. b. 1 inlet and 2 outlets<\/li>\n \t
        18. d. a 4-way mixing valve<\/li>\n \t
        19. c. outdoor reset<\/li>\n \t
        20. c (design supply temp \u2013 room temp) \u00f7 (room temp \u2013 outdoor design temp)<\/li>\n \t
        21. a. warm weather shutdown point (WWSD)<\/li>\n \t
        22. d. a cooling thermostat<\/li>\n \t
        23. a. a DPDT switch<\/li>\n \t
        24. a. a normally closed relay contact<\/li>\n \t
        25. c. the zone valve opens<\/li>\n \t
        26. c. the pump turns on and the burner fires<\/li>\n \t
        27. a. 140\u00b0F<\/li>\n \t
        28. d. 2 N.O. contacts<\/li>\n \t
        29. a. loads<\/li>\n \t
        30. a. in series, in the burner circuit<\/li>\n \t
        31. d. 20<\/li>\n \t
        32. b. near the draft hood<\/li>\n \t
        33. c. a hot water tank<\/li>\n \t
        34. c. 2.50\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 60VA \u00f7 24VAC = 2.50A<\/li>\n \t
        35. b. only the extra thermostats and zone valve motors<\/li>\n \t
        36. c. the DHW zone valve<\/li>\n \t
        37. d. none<\/li>\n \t
        38. b. in parallel<\/li>\n \t
        39. a. in series<\/li>\n \t
        40. a. 1<\/li>\n \t
        41. b. make sure the circuit isn\u2019t powered<\/li>\n \t
        42. d. turn the adjusting screw so that the pointer is directly over \u201c0\u201d<\/li>\n<\/ol>\n

          Competency F5<\/h1>\n

          Self Test 5<\/h2>\n
            \n \t
          1. b. wiring that is not factory installed<\/li>\n \t
          2. c. cable consists of individual wires<\/li>\n \t
          3. a. to prevent abrasion of the wire insulation<\/li>\n \t
          4. d. Canadian Electrical Code<\/li>\n \t
          5. a. metal<\/li>\n \t
          6. a. gang-able<\/li>\n \t
          7. d. through knockouts on the box wall<\/li>\n \t
          8. a. 1.5 m<\/li>\n \t
          9. b. \u201cTeck\u201d is waterproof; \u201cBX\u201d isn\u2019t<\/li>\n \t
          10. b. a threaded adapter<\/li>\n \t
          11. d. galvanized Schedule 40 pipe<\/li>\n \t
          12. c. a raceway<\/li>\n \t
          13. d. 100 Watts<\/li>\n \t
          14. a. maintain at least 2 inches physical distance between them<\/li>\n \t
          15. b. solderless-type<\/li>\n \t
          16. c. [latex]\\dfrac{5}{8}[\/latex]\u2033 \u2013 \u00be\u2033<\/li>\n \t
          17. d. a terminal strip<\/li>\n \t
          18. b. \u00bc\u2033 \u2013 [latex]\\dfrac{3}{8}[\/latex]\u2033<\/li>\n \t
          19. d. two bonding wires<\/li>\n \t
          20. b. a heat sink<\/li>\n<\/ol>","rendered":"

            Competency F1<\/h1>\n

            Self Test 1<\/h2>\n
              \n
            1. b. Respiration<\/li>\n
            2. a. 48<\/li>\n
            3. d. \u201cCold 70\u201d<\/li>\n
            4. b. The ideal heat curve<\/li>\n
            5. c. The intensity of heat present<\/li>\n
            6. a. Mass (weight in pounds) \u00d7 \u0394T (in degrees F) \u00d7 S.H. (specific heat)<\/li>\n
            7. c. 20\u00b0F<\/li>\n
            8. d. 140\u00b0F<\/li>\n
            9. a. Zoning<\/li>\n
            10. d. 0.045 (1 \u00f7 22)<\/li>\n
            11. a. 704150 ft\u00b2 \u00d7 (1 \u00f7 14) \u00d7 (72 \u2013 5) = 150 \u00d7 0.07 \u00d7 67 = 703.5 (round to 704)<\/li>\n
            12. d. The outdoor design temperature<\/li>\n
            13. d. 68\u00b0F<\/li>\n
            14. b. 18\u00b0C (64\u00b0F)<\/li>\n
            15. d. Transmission<\/li>\n
            16. b. Infiltration<\/li>\n
            17. a. 0.04
              \nOutside air film = 0.17;
              \n4\u2033 brick = 0.44; \u00bd\u2033 plywood sheathing = 0.63;
              \nFG insulation = 3.72 \u00d7 5.5\u2033 = 20.46;
              \nvapour barrier = 0; \u00bd\u2033 GWB = 0.45;
              \ninside air film = 0.68
              \nAggregate \u201cR\u201d value = 22.83 \u201cU\u201d value = 1 \u00f7 22.83 = 0.04<\/li>\n
            18. d. Low \u201cE\u201d \u2013 argon-filled<\/li>\n
            19. c. Thermal bridging<\/li>\n
            20. b. 1,930 BTUH(20 \u00d7 15 \u00d7 8) ft\u00b3 \u00d7 (2\/3 ACH \u00d7 0.018) \u00d7 (72 \u2013 5) = 2400 \u00d7 0.012 \u00d7 67 = 1,930 BTUH<\/li>\n
            21. c. The rate would double<\/li>\n
            22. a. The rate would be halved<\/li>\n
            23. d. The ODT for the two houses will be different.<\/li>\n
            24. c. 1 ACH<\/li>\n
            25. b. 0.06<\/li>\n
            26. a. 15.0(3 \u00d7 5.0\/inch)<\/li>\n
            27. a. 1\/3 ACH<\/li>\n
            28. c. 22\u00b0F<\/li>\n
            29. Windows: (2) \u00d7 3\u2032 \u00d7 5\u2032 \u00d7 0.59 \u00d7 (72 – -16) = 1,558 BTUH
              \nNet walls: ((11 \u00d7 8) + (12 \u00d7 8)) \u2013 30 = 154 ft\u00b2
              \n154 \u00d7 0.05 \u00d7 88 = 678 BTUH
              \nCeiling: (12\u2032 \u00d7 11\u2032) \u00d7 0.03 \u00d7 88 = 348 BTUH
              \nFloor: (12\u2032 \u00d7 11\u2032) \u00d7 0.05 \u00d7 88 = 581 BTUH
              \nInfiltration: (12\u2032 \u00d7 11\u2032 \u00d7 8\u2032) \u00d7 (2\/3 \u00d7 0.018) \u00d7 88 = 1,115 BTUH
              \nTotal heat loss: 4,280 BTUH<\/li>\n
            30. a. 1,164 BTUH(17.5\u2032 \u00d7 33.25\u2032) \u00d7 0.04 \u00d7 (65 \u2013 15) = 1,164 BTUH<\/li>\n<\/ol>\n

              Competency F2<\/h1>\n

              Self Test 2<\/h2>\n
                \n
              1. a. PeX \u201cA\u201d<\/li>\n
              2. d. all varieties need oxygen-barrier, whether in wet or dry systems<\/li>\n
              3. c. 2 \u00bd\u2033 polystyrene<\/li>\n
              4. a. in the ceiling below<\/li>\n
              5. a. to give the wall more stability<\/li>\n
              6. c. a heat exchanger<\/li>\n
              7. b. dry systems<\/li>\n
              8. a. reflective foil<\/li>\n
              9. b. they operate at low temperatures is a false statement<\/li>\n
              10. c. make a first pass 6 inches from the outside walls, then turn 180\u00b0 with another 6-inch pass, then resume normal loop layout<\/li>\n
              11. b. 9\u2033 o.c. from Table (2.2A?)<\/li>\n
              12. c. 40 btuh\/ft\u00b2<\/li>\n
              13. b. 300 feet is the norm although there may be some manufacturers who differ<\/li>\n
              14. d. 200 ft\u00b2 – 84.5 ft\u00b2 = 115.5 ft\u00b2 of available area. 3050 btuh \u00f7 115.5 ft\u00b2 = 26.41 btuh\/ft\u00b2 of floor output. From Table (2.2A?), this is 9\u2033 o.c. tube spacing. 115.5 \u00d7 1.3 (tube spacing factor for 9\u2033 o.c.) = 150 feet of tubing<\/li>\n
              15. b. infra-red thermometer<\/li>\n
              16. c. 2:1<\/li>\n
              17. b. 100 psi for 30 minutes<\/li>\n
              18. b. its output<\/li>\n
              19. a. the single circuit with the highest head loss served by the pump<\/li>\n
              20. c. flow rate and feet of head<\/li>\n
              21. b. #4<\/li>\n
              22. a. 19.2 GPM\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 48,000 \u00f7 (5 \u00d7 60 \u00d7 8.33)<\/li>\n
              23. d. 12,000\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12 inches \u00d7 1,000 millinches\/inch<\/li>\n
              24. d. 9 feet of head\u00a0\u00a0\u00a0 180 measured feet \u00d7 1.5 (fitting allowance) = 270 equivalent feet. Under the 400 millinch column, 270 equivalent feet = 9 ft. head<\/li>\n
              25. c. globe<\/li>\n
              26. a. reset control<\/li>\n
              27. c. hydraulic separation<\/li>\n
              28. b. its inner plate surface area<\/li>\n
              29. c. 3.12 feet of head\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 37,000 btuh \u00f7 10,000 btuh\/USGPM = 3.7 GPM
                \n(3.7 \u00f7 3.2)\u00b2 = 1.156\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1.156\u00b2 = 1.3369 psi
                \n1.3369 psi \u00d7 2.31 ft hd\/psi = 3.088 (3.09) feet head<\/li>\n
              30. c. a differential bypass valve<\/li>\n
              31. a. flow rate<\/li>\n
              32. a. 17.56\u00a0\u00a0\u00a0\u00a0 29 feet \u00d7 .433 psi\/ft = 12.56\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.56 + 5 = 17.56 psi<\/li>\n
              33. c. 2.02 USG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (45,000 \u00f7 59,500) \u00d7 2 gal = 1.51 USG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1.51 \u00d7 1.34 (temp. adj.) = 2.02<\/li>\n
              34. a. boiler operation<\/li>\n
              35. c. 1 \u00bc\u2033\u00a0 \u00a0 \u00a0 \u00a065,000 BTUH on Table 2.8\u00a0= 1 \u00bc\u2033 pipe<\/li>\n<\/ol>\n

                Competency F3<\/h1>\n

                Self Test 3<\/h2>\n
                  \n
                1. d. a pole<\/li>\n
                2. c. a throw<\/li>\n
                3. a. by their number of poles and throws<\/li>\n
                4. c. a momentary switch<\/li>\n
                5. b. open on rise<\/li>\n
                6. d. aquastats<\/li>\n
                7. c. a pressure switch<\/li>\n
                8. d. an end switch<\/li>\n
                9. b. 24V AC<\/li>\n
                10. b. 24V AC<\/li>\n
                11. b. the hot leg<\/li>\n
                12. d. EMR<\/li>\n
                13. b. 24V AC<\/li>\n
                14. d. 120V AC<\/li>\n
                15. c. when the coil is energized, the contact positions will reverse<\/li>\n
                16. d. a SPDT switch<\/li>\n
                17. b. a low water cutoff<\/li>\n
                18. c. a DPDT switch<\/li>\n
                19. c. a pressure switch<\/li>\n
                20. d. an SSR<\/li>\n<\/ol>\n

                  Competency F4<\/h1>\n

                  Self Test 4<\/h2>\n
                    \n
                  1. d. lowering the aquastat setting on a non-condensing boiler<\/li>\n
                  2. b. a secondary heat exchanger<\/li>\n
                  3. c. hydraulic separation<\/li>\n
                  4. c. 4 diameters apart<\/li>\n
                  5. c. 10,000\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8.33 lbs\/USG x 60 min\/hr x 20\u00b0F\u0394T<\/li>\n
                  6. a. an end switch<\/li>\n
                  7. b. cold start<\/li>\n
                  8. d. the lines that represent wires won\u2019t cross each other<\/li>\n
                  9. c. on the face of the transformer<\/li>\n
                  10. a. \u201cC\u201d<\/li>\n
                  11. b. \u201cR\u201d<\/li>\n
                  12. d. \u201cY\u201d and \u201cW\u201d<\/li>\n
                  13. a. at the mixing point<\/li>\n
                  14. b. in the boiler return piping<\/li>\n
                  15. c. a diverting valve has less head loss than a mixing valve<\/li>\n
                  16. a. it needs a remote sensor<\/li>\n
                  17. b. 1 inlet and 2 outlets<\/li>\n
                  18. d. a 4-way mixing valve<\/li>\n
                  19. c. outdoor reset<\/li>\n
                  20. c (design supply temp \u2013 room temp) \u00f7 (room temp \u2013 outdoor design temp)<\/li>\n
                  21. a. warm weather shutdown point (WWSD)<\/li>\n
                  22. d. a cooling thermostat<\/li>\n
                  23. a. a DPDT switch<\/li>\n
                  24. a. a normally closed relay contact<\/li>\n
                  25. c. the zone valve opens<\/li>\n
                  26. c. the pump turns on and the burner fires<\/li>\n
                  27. a. 140\u00b0F<\/li>\n
                  28. d. 2 N.O. contacts<\/li>\n
                  29. a. loads<\/li>\n
                  30. a. in series, in the burner circuit<\/li>\n
                  31. d. 20<\/li>\n
                  32. b. near the draft hood<\/li>\n
                  33. c. a hot water tank<\/li>\n
                  34. c. 2.50\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 60VA \u00f7 24VAC = 2.50A<\/li>\n
                  35. b. only the extra thermostats and zone valve motors<\/li>\n
                  36. c. the DHW zone valve<\/li>\n
                  37. d. none<\/li>\n
                  38. b. in parallel<\/li>\n
                  39. a. in series<\/li>\n
                  40. a. 1<\/li>\n
                  41. b. make sure the circuit isn\u2019t powered<\/li>\n
                  42. d. turn the adjusting screw so that the pointer is directly over \u201c0\u201d<\/li>\n<\/ol>\n

                    Competency F5<\/h1>\n

                    Self Test 5<\/h2>\n
                      \n
                    1. b. wiring that is not factory installed<\/li>\n
                    2. c. cable consists of individual wires<\/li>\n
                    3. a. to prevent abrasion of the wire insulation<\/li>\n
                    4. d. Canadian Electrical Code<\/li>\n
                    5. a. metal<\/li>\n
                    6. a. gang-able<\/li>\n
                    7. d. through knockouts on the box wall<\/li>\n
                    8. a. 1.5 m<\/li>\n
                    9. b. \u201cTeck\u201d is waterproof; \u201cBX\u201d isn\u2019t<\/li>\n
                    10. b. a threaded adapter<\/li>\n
                    11. d. galvanized Schedule 40 pipe<\/li>\n
                    12. c. a raceway<\/li>\n
                    13. d. 100 Watts<\/li>\n
                    14. a. maintain at least 2 inches physical distance between them<\/li>\n
                    15. b. solderless-type<\/li>\n
                    16. c. [latex]\\dfrac{5}{8}[\/latex]\u2033 \u2013 \u00be\u2033<\/li>\n
                    17. d. a terminal strip<\/li>\n
                    18. b. \u00bc\u2033 \u2013 [latex]\\dfrac{3}{8}[\/latex]\u2033<\/li>\n
                    19. d. two bonding wires<\/li>\n
                    20. b. a heat sink<\/li>\n<\/ol>\n","protected":false},"author":123,"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-229","back-matter","type-back-matter","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/pressbooks\/v2\/back-matter\/229","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/pressbooks\/v2\/back-matter"}],"about":[{"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/wp\/v2\/types\/back-matter"}],"author":[{"embeddable":true,"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/wp\/v2\/users\/123"}],"version-history":[{"count":0,"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/pressbooks\/v2\/back-matter\/229\/revisions"}],"metadata":[{"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/pressbooks\/v2\/back-matter\/229\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/wp\/v2\/media?parent=229"}],"wp:term":[{"taxonomy":"back-matter-type","embeddable":true,"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/pressbooks\/v2\/back-matter-type?post=229"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/wp\/v2\/contributor?post=229"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/opentextbc.ca\/plumbing3f\/wp-json\/wp\/v2\/license?post=229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}