Gas & FuelCâu 74 / 110
A leak test on an in-service gas line uses a soap-bubble or electronic method rather than a pressure drop. When is the bubble/electronic leak check the appropriate method?
a.On new rough piping before drywall
b.On existing pressurized piping and appliance connections that cannot be depressurized for a formal test
c.Only on propane tanks
d.Never on natural gas
Giải thích
A leak-detection solution or electronic sniffer is used to check joints and connections on piping and appliances that are already in service and under normal operating pressure, where a formal pressure-drop test is impractical. Bubbles at a joint reveal an escaping leak for immediate repair. A never open flame is used to check for gas leaks.
Trích dẫn luật: IFGC §406.4Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
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