Answers to 20 Question Plumbers test

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  1. d Table 706.3 footnote a
  2. a 707.3
  3. c Table 710.1 (2)
  4. d 305.3 9EXCEPTION) gas code
  5. d Appendix E  table e103.3 (2) see 5a below
  1. c Table 604.3
  2. a 360 degrees/8 = 45
  3. a sec 303.3 ipc, see 8a below

 9   c         

  1. a Table 906.5.1 see footnote a
  2. c Table 906.1 IPC
  3. a Sec 305.3 IPC  note: standard pipe sizes are 1-1/4”, 1-1/2” 2”, 2.5” 3”, 3.5”.  3” is two pipe sizes larger than 2”
  4. a. 30 inches , 802.3 IPC
  5. b. chapter 2 IPC deffinitions

15   b.      410.4 IPC   ( not more than 50% may be substituted)

  1. c. 424.2 IPB   3/5 =.60, 3 wc are less than 67%
  2. c. 305.1 (.008)
  3. b. 2002.1 IPC
  4. c.  1003.4.2.2
  5. b NASCLA’s “Contractor Business and Project Management”  $750 + $52.50 tax = $802.50 + $200 labor =$1002.50 total cost, 100%-35%= 65%,  $1002.50/.65=      $1542.31
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5a.  The intersection of 18 GPM and 3/4″ pipe is very close to the 10 Ft. Sec line.

8a.  Find the intersection of 10 gpm and 3/4″ pipe. Then, note the pressure drop (10psi). 10 psi is the pressure drop (or loss) for 100 ft of pipe, not 150 feet. we must calculate the pressure drop for 150 feet using the following formula

(measured length / 100) X pressure drop per 100 ft. = adjusted pressure drop

150/100 x 10 = 15 psi pressure drop for 150 feet pipe