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Plumber's Licensing Exam: Water Heaters
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Plumber's Licensing Exam: Water Heaters
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25 Questions

1. The outlet pipe from a T & P relief valve must
2. The maximum water outlet temperature at a tub or shower is 115°F.
3. The inlet male threads on a water heater drain valve must be what pipe size?
4. Tank-type water heaters must have a temperature and pressure relief valve installed directly into the ________________ of the water heater.
5. Water heater installation instructions from the manufacturer
6. The relief valve must be installed in the hot outlet pipe near the water heater.
7. Hot water storage tanks must be insulated to lose no more than _____ BTUs per hour.
8. The highest pressure rating allowed for a relief valve on a water heater is
9. A tank-type water heater
10. A relief valve outlet must be piped directly into the sanitary sewer.
11. A passageway to a water heater in an attic
12. A water heater drain pan must be installed when a water heater leak could cause _____.
13. If a water supply is equipped with a backflow preventer, the T & P relief valve may serve as control for thermal expansion.
14. The outlet pipe of a T & P relief valve must be metal.
15. A water heater drain pan must be at least _____ inches deep.
16. When superheated water flashes to steam, it expands
17. All water heater supply systems must have automatic temperature control.
18. The valve on the inlet pipe for a water heater must be a full-port design.
19. The relief valve outlet pipe must end within _____ inches of the floor.
20. A temperature and pressure relief valve
21. A water heater cannot be installed in any attic area.
22. The end of the outlet pipe for a temperature and pressure relief valve is permitted to
23. A water heater pan
24. A water heater must be provided with a way to prevent siphon emptying of the tank.
25. A valve is required on both the cold inlet and the hot outlet pipes of the water heater.

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