Gas Piping第 93 / 120 题
A new residential gas piping system will operate at a working pressure of 7 in w.c. (about 1/4 psi). What is the minimum test pressure required for the pressure test?
a.0.375 psi, which is 1.5 times the working pressure
b.3 psi
c.10 psi
d.1.5 in w.c.
解析
The test pressure must be at least 1.5 times the proposed maximum working pressure but never less than 3 psi, and 1.5 times 1/4 psi is far below that floor, so 3 psi governs. The 0.375 psi and 1.5 in w.c. answers apply the multiplier while ignoring the 3 psi minimum; 10 psi exceeds what the code requires for this system.
法律依据: IFGC §406.4免费刷完整 120 道题库 — 无需注册。
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