Exam (elaborations)
G2 Gas Technician Module 10.
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G2 Gas Technician Module 10.
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G2 Gas Technician Module 10The working pressure differential between the gas meter outlet and the appliance
regulator inlet at furthest appliance from meter - ANS-Define pressure drop
0.5" w.c. - ANS-What is the Max pressure drop >7" w.c. NG
1" w.c. - ANS-What is the Max pressure drop 7" - 14" w.c. NG
After piping system is installed and before any appliance is connected to it. - ANS-When
do you do a high pressure test?
1. Isolate the piping system - ANS-
2. Cap or plug open ends - ANS-
3. Insert a pressure gauge at one end of the system - ANS-
4. Pressurize system with air or inert gas to specified test pressure. - ANS-How do you
do a High pressure test
1. High pressure test prior to connecting appliance. Disconnect piping at gas meter and
before appliance valve train. - ANS-
2. Leak test with meter and appliance connected under normal operating pressure. Use
a manometer or lowest volume test dial on meter. 10 min duration - ANS-
3. Leak test using a liquid solution under normal operating pressure. Check all fittings. -
ANS-
4. Can also check system with manometer in an existing system which measure in. of
W.C. this is for systems up to 14" W.C. - ANS-Three tests required by code when
installing
1. 3" in diameter - ANS-
2. Max range shall exceed test pressure by at least 15% but less then 300% - ANS-
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