PRACTICE PLUMBING LICENSING EXAM (Contains 20 questions timed 1 hour 15 minutes)

1. A drainage branch pipe extending laterally from a soil or waste stack, that receives the discharge from two or more fixture drains is called a

a) fixture drain
b) horizontal branch drain
c) drainage fixture unit
d) battery
2. How many eighth bends are required to make a 45 degree turn?

a) 1
b) 2
c) 3
d) 4
3. A gas fired water heater, listed and labeled as resistant to flammable vapor ignition, may be installed

a) dirrectly on a garage floor
b) 10 inches above the garage floor
c) 18 inches above the garage floor
d) any of the above
4. Piping that passes through concrete walls shall be protected by a sleeve with a minimum thickness of ____.

a) .10 inch
b) .25 inch
c) .025 inch
d) .010 inch
5. showers waste outlets shall shall have a removable strainer, not less than ___ inches in diameter

a) .025
b) 3
c) 2.5
d) 2
6. Using 150 feet of 3/4 " smooth type k pipe, what is the approximate pressure drop if 10 gpm is to be delivered

a) 5 psi
b) 2.5 psi
c) 22.5 psi
d) 15 psi
7. A fixture with a continuous flow of 2 gpm has the equivalent of _____ drainage fixture units

a) 4
b) 3
c) 2
d) 1
8. The diameter of a stack vent with a developed length of 78 feet and connected to a 3 inch waste stack handling 27 drainage fixture units is _____ inches

a) 1-1/4
b) 1-1/2
c) 2
d) 3
9. The velocity of 18 gpm flowing in a 3/4" smooth type L pipe is about ________ feet per second

a) 1.25
b) 2
c) 4
d) 3.75
10. which of the following fittings are not allowed for use when changing a 3" drain's direction horizontal to horizontal

a) long sweep
b) eighth bend
c) sixth bend
d) quarter bend
11. The vertical distance from the fixture outlet to the trap weir shall not exceed ____ inches

a) 18
b) 24
c) 30
d) 36
12. All plastic pipe fittings and components shall be third party certified as conforming to _____________

a) ANSI/NSF 14
b) ASSE1022
c) CAN/CSA-B64.2
d) ASME A 112.1.2
13. A bathroom requiring 5 water closets may substitute _____ water closets with urinals

a) 1
b) 2
c) 3
d) 4
14. An eight inch stack is required to drain 2400 drainage fixture units 32; from a four story building. Since the fourth story has only 58 drainage fixture units, the stack serving that story may be reduced to ____ inches

a) 2
b) 2-1/2
c) 3
d) 4
15. The measured length of a sump vent is 75 feet. What is the assumed developed length if allowances for entrance losses, friction due to fittings, changes in direction and diameter are not available.

a) 112.5 feet
b) 75 feet
c) 137.5 feet
d) 150 feet
16. The area to be serviced by an oil separator in a service station is 300 square feet.. What is the minimum of the oil separator

a) 4 cubic feet
b) 6 cubic feet
c) 8 cubic feet
d) 10 cubic fet
17. All indirect waste piping that exceed ____ feet in developed length, measured horizontally, shall be traped

a) 2
b) 3
c) 4
d) 6
18. When sizing a piping system, the minimum flow rate for a shower is________ gpm.

a) 1
b) 2
c) 2.5
d) 3
19. When selecting a sleeve for a 2 inch pipe passing through a foundation wall, the sleeve must be _____ diameter.

a) 3
b) 4
c) 5
d) 6
20. A building requiring 5 drinking fountains my substitute a maximum of_____ fountains with bottled water dispensers

a) 1
b) 2
c) 3
d) 4
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