Gas PipingCâu 94 / 120
The same 3 psi test is applied to the piping with a mechanical gauge. What is the minimum time the pressure must be held without any loss?
a.10 minutes
b.5 minutes
c.30 minutes
d.24 hours
Giải thích
The test duration must be at least 10 minutes, or longer if the code official or the size of the system requires it, with no drop in pressure. Five minutes is too short to satisfy the minimum, and 30 minutes and 24 hours exceed what the code requires for a standard residential test.
Trích dẫn luật: IFGC §406.4.1Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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