Codes & Safety第 106 / 120 题
A drainage, waste and vent system is being water tested. Which statement describes the test correctly?
a.All openings are tightly plugged and the system is filled with water to at least a 10 ft head, except for the uppermost 10 ft of the system, and the water level is held for at least 15 minutes with no drop
b.The system is filled to a 5 ft head and held for 5 minutes, and a small drop is acceptable if no leak is visible
c.Only the piping below the lowest floor must be filled, and the water must stand for 30 minutes
d.Water is run through each fixture for 15 minutes while the inspector watches the joints for drips
解析
The water test plugs every opening, fills the system so that at least a 10 ft head of water stands on the section being tested, and requires the level to hold for a minimum of 15 minutes with no loss. The uppermost 10 ft of the system is the recognized exception, since there is no way to put a 10 ft head on the highest piping. A 5 ft head for 5 minutes is not a recognized test, and any drop in the water level means a leak, not an allowable tolerance. Running water through fixtures is a flow check, not a pressure test, and would not reveal a weeping joint under head.
法律依据: IPC §312.2免费刷完整 120 道题库 — 无需注册。
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