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Plumber's Licensing Exam: Storm Drainage
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Plumber's Licensing Exam: Storm Drainage
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25 Questions

1. A subsoil drain must have a minimum diameter of _____ inches.
2. Secondary roof drain conductors can connect with the primary storm drainage system
3. Conductors are required to be tested in the same manner as
4. Secondary storm drains are sized the same as primary storm drains.
5. A backwater valve MUST be installed in a subsoil drain that could be subject to backflow.
6. Subsoil drains must be
7. A subsoil drain sump does not require a gastight seal.
8. A storm drainage system needs a trap only when it connects to a _______.
9. Roof drain sizing is based on
10. A drain located in a window well can be connected to a storm drain.
11. Materials for a storm drainage system must comply with the same rules as those for a sanitary drainage system.
12. Storm water cannot be drained into sewers intended for
13. A sump must have a depth of ______ inches.
14. A sump must have a diameter of ______ inches.
15. Only roofs that have a design that causes ponding during rain require a secondary roof drainage system.
16. Cleanouts are required in a storm drain system
17. Roofs must be designed to carry the depth of water load up to
18. All sump pump discharge pipes require
19. If a vertical wall diverts rainwater onto a roof, _______ percent of its area must be added to the roof area for sizing the roof drains.
20. A roof used as a deck shall have a flat drain _____ times the area of the conductor.
21. Storm runoff can drain to
22. Storm water traps must be sized
23. Roof drains need strainers that are
24. The maximum slope for a horizontal storm drain is
25. What type of fittings must be used in a storm drainage system?

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