ACTUAL Exam Questions and CORRECT
Answers
The working pressure differential between the gas meter outlet and the appliance regulator inlet
at furthest appliance from meter - CORRECT ANSWER - Define pressure drop
0.5" w.c. - CORRECT ANSWER - What is the Max pressure drop >7" w.c. NG
1" w.c. - CORRECT ANSWER - What is the Max pressure drop 7" - 14" w.c. NG
After piping system is installed and before any appliance is connected to it. - CORRECT
ANSWER - When do you do a high pressure test?
1. Isolate the piping system - CORRECT ANSWER -
2. Cap or plug open ends - CORRECT ANSWER -
3. Insert a pressure gauge at one end of the system - CORRECT ANSWER -
4. Pressurize system with air or inert gas to specified test pressure. - CORRECT
ANSWER - 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. - CORRECT ANSWER -
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 - CORRECT ANSWER -
, 3. Leak test using a liquid solution under normal operating pressure. Check all fittings. -
CORRECT ANSWER -
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. - CORRECT ANSWER - Three tests required by code when
installing
1. 3" in diameter - CORRECT ANSWER -
2. Max range shall exceed test pressure by at least 15% but less then 300% - CORRECT
ANSWER -
3. Pressure gauge shall read in increments of 2psig or 2% of maximum dial reading of pressure
gauge. Whichever is less. - CORRECT ANSWER - High pressure test gauges must be:
Annex H - CORRECT ANSWER - Purging practices are located in which Annex?
The break point pointing on the same side as the appliance - CORRECT ANSWER -
Manual shut off valves shall be installed with?
Outdoor use only. - CORRECT ANSWER - What location can you install a #3.16 manual
shut off valve?
1. Type of fuel - CORRECT ANSWER -
2. Supply pressure - CORRECT ANSWER -
3. Type of material - CORRECT ANSWER -