GAS FITTER 2 COMPREHENSIVE EXAM 2026
QUESTIONS WITH ANSWERS GRADED A+
● On gas piping, when a flange joint is opened, the __________ shall be
replaced. Answer: Gasket
● Pipe joints for gas shall be _______________________. Answer:
threaded, flanged or welded
● The appliances, equipment and systems regulated by the NYCFGC
shall not be located in a(n) ___________? Answer: Elevator shaft
● The effect of new gas piping removing the smell of mercaptan from
the natural gas in the pipe is known as what? Answer: Odor masking
● The longest length in a gas system is determined to be 160'. According
to table 402.4(1) in the NYCFGC, what size would the gas pipe be in a
particular section if the cumulative load on that section is 6,000 cubic
feet per hour? Answer: 5"
● The qualified welder shall __________ all welds with his or her
________. Answer: identify, symbol/number
, ● The range of an analog non mercury gauge to test at a gauge pressure
of 3 PSI shall not exceed ____ PSIG. Answer: 5
● The shutoff valve for a gas appliance shall be located in the same
room as the appliance, within ________ of the appliance Answer: 6'
● The use of _____________ is prohibited on gas piping Answer: Lamp
wick
● Threaded joint compounds shall be ___________ to the action of
liquified petroleum gas or to any other chemical constituents of the gases
to be conducted through the piping. Answer: Resistant
● To detect the presence of natural gas, you may use ____________
Answer: A CGI
● Underground gas piping shall be installed at a minimum depth of ____
below grade. Answer: 24"
● Using the table provided, calculate the fuel gas pipe size.
If an appliance input rating was 80 CuFt/Hr, and the longest length in the
system were 88' long, what is the minimum pipe size for the appliance
branch if it were 19' developed length from the riser to the appliance
valve? Answer: 3/4"
QUESTIONS WITH ANSWERS GRADED A+
● On gas piping, when a flange joint is opened, the __________ shall be
replaced. Answer: Gasket
● Pipe joints for gas shall be _______________________. Answer:
threaded, flanged or welded
● The appliances, equipment and systems regulated by the NYCFGC
shall not be located in a(n) ___________? Answer: Elevator shaft
● The effect of new gas piping removing the smell of mercaptan from
the natural gas in the pipe is known as what? Answer: Odor masking
● The longest length in a gas system is determined to be 160'. According
to table 402.4(1) in the NYCFGC, what size would the gas pipe be in a
particular section if the cumulative load on that section is 6,000 cubic
feet per hour? Answer: 5"
● The qualified welder shall __________ all welds with his or her
________. Answer: identify, symbol/number
, ● The range of an analog non mercury gauge to test at a gauge pressure
of 3 PSI shall not exceed ____ PSIG. Answer: 5
● The shutoff valve for a gas appliance shall be located in the same
room as the appliance, within ________ of the appliance Answer: 6'
● The use of _____________ is prohibited on gas piping Answer: Lamp
wick
● Threaded joint compounds shall be ___________ to the action of
liquified petroleum gas or to any other chemical constituents of the gases
to be conducted through the piping. Answer: Resistant
● To detect the presence of natural gas, you may use ____________
Answer: A CGI
● Underground gas piping shall be installed at a minimum depth of ____
below grade. Answer: 24"
● Using the table provided, calculate the fuel gas pipe size.
If an appliance input rating was 80 CuFt/Hr, and the longest length in the
system were 88' long, what is the minimum pipe size for the appliance
branch if it were 19' developed length from the riser to the appliance
valve? Answer: 3/4"
