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Plumbing & Water Heaters
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Avg score: 76% Most missed: “Water heater installation instructions from the manufacturer”
Plumbing systems deliver clean water (supply) and remove waste, operating through pipes, valves, and drains. Water heaters, the core of hot water systems, use electric elements or gas burners to heat water, with storage tanks (requiring yearly flushing) or tankless units commonly used. Key maintenance includes testing the temperature-pressure relief valve and replacing the sacrificial anode rod to prevent corrosion.  Plumbing System Basics Supply System: Pipes, usually copper or plastic (PEX/PVC), under pressure bring fresh water to fixtures. Drain-Waste-Vent (DWV) System: Uses gravity to... Show more
Plumbing & Water Heaters
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25 Questions

1. The highest pressure rating allowed for a relief valve on a water heater is
2. Tank-type water heaters must have a temperature and pressure relief valve installed directly into the ________________ of the water heater.
3. The relief valve must be installed in the hot outlet pipe near the water heater.
4. The inlet male threads on a water heater drain valve must be what pipe size?
5. A water heater cannot be installed in any attic area.
6. Seismic supports are always optional if a homeowner desires the added security.
7. A relief valve outlet must be piped directly into the sanitary sewer.
8. The valve on the inlet pipe for a water heater must be a full-port design.
9. Water heater installation instructions from the manufacturer
10. If a water supply is equipped with a backflow preventer, the T & P relief valve may serve as control for thermal expansion.
11. Since water will release from a relief valve forcefully, the outlet pipe of the relief valve may be piped upward to a drain point.
12. The end of the outlet pipe for a temperature and pressure relief valve is permitted to
13. A water heater pan
14. The maximum temperature water allowed in a potable hot water distribution system is
15. All water heater supply systems must have automatic temperature control.
16. A tank-type water heater
17. The outlet pipe from a T & P relief valve must
18. The maximum water outlet temperature at a tub or shower is 115°F.
19. All water heaters must be installed 18 in. off the floor.
20. The outlet pipe of a T & P relief valve must be metal.
21. A passageway to a water heater in an attic
22. A water heater relief valve may discharge into the water heater drain pan.
23. A temperature and pressure relief valve
24. When superheated water flashes to steam, it expands
25. A valve is required on both the cold inlet and the hot outlet pipes of the water heater.