CFESA Gas EXAM 2025\2026 ACTUAL COMPLETE REAL EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
ALREADY GRADED A+ /NEWEST EXAM / JUST RELEASED!!
What is the minimum incoming gas pressure for natural gas that
you must have
to prevent problems? - ANSWER-2 inches over the high
required pressure of
the equipment on the
gas line
What does the gas code state regarding gas piping size? -
ANSWER-The code
states it must be sized to handle the maximum volume of all
the equipment
attached to it, plus needs for the
foreseeable future
What kind of pipe must be used on natural gas lines? -
ANSWER-Black iron pipe is mandated by most local
jurisdictions. Some jurisdictions may make exceptions for the
use of CSST or other materials
What material can be used for LP gas lines? - ANSWER-Black
iron pipe is the
,material of choice, however copper can
also be used
What kind of sealants can be used on natural gas fittings? -
ANSWER-Pipe
sealants compatible with the type of gas
being used
A three-quarter elbow is equivalent to how long a pipe? -
ANSWER-2 feet
A three-quarter tee is equivalent to how long a pipe? -
ANSWER-4 feet if
direction of flow changes, 0 if its
straight through
Commercial flexible gas lines must have what approvals to
be acceptable in
most code areas? - ANSWER-AGA
and NSF
What is the major difference between a commercial and
domestic flexible gas connector? - ANSWER-The inside
diameter of a commercial flexible gas line is the internal size of
a black iron pipe. Domestic lines are reduced in size
What is the purpose of the stainless steel braid of the outside
of a commercial
,flexible gas connector? - ANSWER-Added support to the gas
line to keep it
from tearing loose from the
connections
When is a flexible gas connector allowed for an equipment
installation? -
ANSWER-When the equipment is
considered movable
What is the major problem usually experienced right from the
onset when using a domestic connector in a commercial
installation? - ANSWER-Insufficient gas volume issues
What are the 2 basic types of disconnects? (Referring to the
way they are coupled and uncoupled) - ANSWER-push together
to snap, and pull the collar back to lock
What is incorporated into the construction of approved
disconnects as protection in case of fire? - ANSWER-A fusible
link that will melt out in case of fire, and shut off the gas valve
Why is a restraining cable needed, and how must the
restraining cable be installed? - ANSWER-to keep equipment
from being pulled out so far that it kinks the end of the gas line
To which side of the flexible gas connector is the female
section of the quick
, disconnect installed? - ANSWER-The
supply side
Why is a manual gas shut off required at the equipment, and
where must it be
installed? - ANSWER-its required by code to be installed
within 5 feet of the
equipment in a visible, accessible
location
What is the difference between yellow jacketed and black
jacketed CSST
tubing? - ANSWER-black jacketed is insulated against
lightning strike
When using CSST tubing what electrical codes must be
followed? - ANSWER-
codes refering to the proper grounding and bonding
of CSST pipe
What is the function of a burner orifice? - ANSWER-to regulate
flow of gas to
the
burner
What determines the gas flow rate through an orifice? -
ANSWER-The hole size
in the orifice, the specific gravity, and the
gas pressure
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
ALREADY GRADED A+ /NEWEST EXAM / JUST RELEASED!!
What is the minimum incoming gas pressure for natural gas that
you must have
to prevent problems? - ANSWER-2 inches over the high
required pressure of
the equipment on the
gas line
What does the gas code state regarding gas piping size? -
ANSWER-The code
states it must be sized to handle the maximum volume of all
the equipment
attached to it, plus needs for the
foreseeable future
What kind of pipe must be used on natural gas lines? -
ANSWER-Black iron pipe is mandated by most local
jurisdictions. Some jurisdictions may make exceptions for the
use of CSST or other materials
What material can be used for LP gas lines? - ANSWER-Black
iron pipe is the
,material of choice, however copper can
also be used
What kind of sealants can be used on natural gas fittings? -
ANSWER-Pipe
sealants compatible with the type of gas
being used
A three-quarter elbow is equivalent to how long a pipe? -
ANSWER-2 feet
A three-quarter tee is equivalent to how long a pipe? -
ANSWER-4 feet if
direction of flow changes, 0 if its
straight through
Commercial flexible gas lines must have what approvals to
be acceptable in
most code areas? - ANSWER-AGA
and NSF
What is the major difference between a commercial and
domestic flexible gas connector? - ANSWER-The inside
diameter of a commercial flexible gas line is the internal size of
a black iron pipe. Domestic lines are reduced in size
What is the purpose of the stainless steel braid of the outside
of a commercial
,flexible gas connector? - ANSWER-Added support to the gas
line to keep it
from tearing loose from the
connections
When is a flexible gas connector allowed for an equipment
installation? -
ANSWER-When the equipment is
considered movable
What is the major problem usually experienced right from the
onset when using a domestic connector in a commercial
installation? - ANSWER-Insufficient gas volume issues
What are the 2 basic types of disconnects? (Referring to the
way they are coupled and uncoupled) - ANSWER-push together
to snap, and pull the collar back to lock
What is incorporated into the construction of approved
disconnects as protection in case of fire? - ANSWER-A fusible
link that will melt out in case of fire, and shut off the gas valve
Why is a restraining cable needed, and how must the
restraining cable be installed? - ANSWER-to keep equipment
from being pulled out so far that it kinks the end of the gas line
To which side of the flexible gas connector is the female
section of the quick
, disconnect installed? - ANSWER-The
supply side
Why is a manual gas shut off required at the equipment, and
where must it be
installed? - ANSWER-its required by code to be installed
within 5 feet of the
equipment in a visible, accessible
location
What is the difference between yellow jacketed and black
jacketed CSST
tubing? - ANSWER-black jacketed is insulated against
lightning strike
When using CSST tubing what electrical codes must be
followed? - ANSWER-
codes refering to the proper grounding and bonding
of CSST pipe
What is the function of a burner orifice? - ANSWER-to regulate
flow of gas to
the
burner
What determines the gas flow rate through an orifice? -
ANSWER-The hole size
in the orifice, the specific gravity, and the
gas pressure
