4/6/25, 9:51 CFESA GAS - CH 6 Gas Piping |
AM
CFESA GAS - CH 6 GAS PIPING EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS VERIFIED
What does the gas code state regarding The pipe must be sized to handle max volume of all equip attached plus needs for
gas piping size? foreseeable future.
What kind of pipe must be used on Black iron pipe is mandated by most local jurisdictions. Some jurisdictions may
natural gas lines? make exceptions for use of CSST or other materials.
What materials can be used for LP gas Black iron pipe is the material of choice however copper can also be used.
lines?
What kind of sealants can be used on Pipe sealants compatible with the type of gas being used.
natural gas fittings?
A 3⁄4 elbow is equivalent to how long 2'
a pipe?
A 3/4" tee is equivalent to how long a 4' if direction of flow changes, 0' if straight through.
pipe?
Commercial flexible gas lines must have AGA and NSF
what approvals to be acceptable in most
code areas?
What is the major difference between a The inside diameter of a commercial flexible gas line is the internal size of black
commercial and domestic flexible gas iron pipe. Domestic gas lines are reduced in size.
connector?
What is the purpose of the stainless steel Added support to the gas line to keep it from tearing loose from the connections.
braid on the outside of a commercial
flexible gas connector?
When is a flexible gas connector When the equipment is considered movable.
allowed for an equipment installation?
What is the major problem usually Insufficient gas volume issues.
experienced right from the onset when
using a domestic connector in a
commercial installation?
What are the 2 basic types of Push together to snap, and pull the collar back to lock.
disconnects? (Referring to the way they
are coupled and uncoupled).
What is incorporated into the A fusible link that will melt out in case of fire, and shut off the gas flow.
construction of approved disconnects as
protection in case of fire?
Why is a restraining cable needed, and To keep equipment from being pulled so far out that it kinks the end of the gas
how must the restraining cable be lines.
installed?
To which side of the flexible gas The supply side
connector is the female section of the
quick disconnect installed?
Why is a manual gas shut off required at It's required by code to be installed within 5 feet of the equipment in a visible,
the equipment, and where must it be accessible location
installed?
What is the difference between yellow Black jacketed is insulated against lightning strike.
jacketed and black jacketed CSST tubing?
When using CSST tubing what electrical Codes referring to the proper grounding and bonding of CSS T pipe.
codes must be followed?
1/
2
AM
CFESA GAS - CH 6 GAS PIPING EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS VERIFIED
What does the gas code state regarding The pipe must be sized to handle max volume of all equip attached plus needs for
gas piping size? foreseeable future.
What kind of pipe must be used on Black iron pipe is mandated by most local jurisdictions. Some jurisdictions may
natural gas lines? make exceptions for use of CSST or other materials.
What materials can be used for LP gas Black iron pipe is the material of choice however copper can also be used.
lines?
What kind of sealants can be used on Pipe sealants compatible with the type of gas being used.
natural gas fittings?
A 3⁄4 elbow is equivalent to how long 2'
a pipe?
A 3/4" tee is equivalent to how long a 4' if direction of flow changes, 0' if straight through.
pipe?
Commercial flexible gas lines must have AGA and NSF
what approvals to be acceptable in most
code areas?
What is the major difference between a The inside diameter of a commercial flexible gas line is the internal size of black
commercial and domestic flexible gas iron pipe. Domestic gas lines are reduced in size.
connector?
What is the purpose of the stainless steel Added support to the gas line to keep it from tearing loose from the connections.
braid on the outside of a commercial
flexible gas connector?
When is a flexible gas connector When the equipment is considered movable.
allowed for an equipment installation?
What is the major problem usually Insufficient gas volume issues.
experienced right from the onset when
using a domestic connector in a
commercial installation?
What are the 2 basic types of Push together to snap, and pull the collar back to lock.
disconnects? (Referring to the way they
are coupled and uncoupled).
What is incorporated into the A fusible link that will melt out in case of fire, and shut off the gas flow.
construction of approved disconnects as
protection in case of fire?
Why is a restraining cable needed, and To keep equipment from being pulled so far out that it kinks the end of the gas
how must the restraining cable be lines.
installed?
To which side of the flexible gas The supply side
connector is the female section of the
quick disconnect installed?
Why is a manual gas shut off required at It's required by code to be installed within 5 feet of the equipment in a visible,
the equipment, and where must it be accessible location
installed?
What is the difference between yellow Black jacketed is insulated against lightning strike.
jacketed and black jacketed CSST tubing?
When using CSST tubing what electrical Codes referring to the proper grounding and bonding of CSS T pipe.
codes must be followed?
1/
2
