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Plumber's Licensing Exam: Vents
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Note: Answers may vary based on whether the IPC or UPC is applicable.

Plumber's Licensing Exam: Vents
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25 Questions

1. Under the IPC, an air admittance valve can be installed below the flood-level rim of a sink.
2. A trap weir that has a 11/4-in. diameter can be _________ feet from a vent.
3. How far can the weir of a water closet trap be from a vent?
4. The greatest pressure differential allowed against a trap is
5. A vent stack can terminate with an air admittance valve.
6. A trap weir that has a 4-in. diameter can be _________ feet from a vent.
7. A combination drain and vent system is used
8. A trap weir that has a 2-in. diameter can be _________ feet from a vent.
9. Any type of fixture can be installed using a combination drain and vent.
10. What is the smallest size vent permitted for a 4-in. stack?
11. The primary purpose of vent piping is
12. Horizontal vent pipes must be sloped
13. A urinal can be connected to a combination drain and vent pipe.
14. What is the maximum venting system design target for pressures created in the vent system?
15. A trap weir that has a 11/2-in. diameter can be _________ feet from a vent.
16. The materials used for vents must be selected according to the same chart as that for drainage piping.
17. A common application of a combination drain and vent system is
18. Self-siphonage is a problem with
19. A circuit vent must be connected to the waste line between the fixture furthest upstream and the next fixture downstream.
20. If a roof has other uses besides weather protection, the vent termination must be _______ feet above the roof.
21. Air admittance valves are approved for use on kitchen sinks.
22. If there is greater than 2 in. WC vacuum in a properly sized and installed vent system, what is a likely cause?
23. A waste stack must remain the same diameter throughout its length.
24. A waste stack must have a stack vent.
25. In a multistory building with a vent stack, a relief vent must be installed every __________ branch intervals.

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