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Plumber's Licensing Exam: Indirect and Special Wastes
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Plumber's Licensing Exam: Indirect and Special Wastes
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25 Questions

1. The materials used for standard drainage systems are high enough quality for an indirect waste.
2. An indirect drain from a refrigeration coil can be no longer than
3. Indirect waste pipe materials can be
4. A three-compartment sink used only for dish-washing must be
5. The drain hose for a domestic dishwasher
6. All of the drains in a combination fixture that is used for food preparation must be individually trapped.
7. A vent on an indirect waste is required when the developed length of the indirect waste pipe is _____ feet or longer.
8. An air-conditioning condensate drain can connect to a lavatory tailpiece.
9. Corrosive waste can be discharged into a plumbing system if
10. A floor drain in a walk-in freezer can drain into the sanitary drainage system through an air break only if
11. If an indirect waste is long enough to require a vent, the vent
12. Condensate drains from refrigeration equipment must be indirectly drained, but may be drained with an air break.
13. An air break provides sufficient backflow protection for an automatic clothes washer.
14. Any discharge from a potable water system must be indirectly drained with an air break.
15. The drain from a swimming pool filter backwash can be drained
16. Which fixture must be drained indirectly?
17. If draining to a sanitary drain, pool deck drains must pass through an air gap.
18. Standpipes
19. The connection created when the discharge hose of an automatic washing machine is inserted into a standpipe is called
20. The purpose of an air gap is
21. In an indirect waste, the distance between the outlet of the indirect waste pipe and the flood-level rim of the receptor must be
22. How can a steam vent be drained to a sanitary drainage system?
23. Indirect waste pipes that exceed _____ feet in developed length must be trapped.
24. Chemical drainage and vent systems must be separate from the building drain and vent system.
25. When an air break is specified, an air gap is acceptable.

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