GAS CFESA EXAM WITH VERIFIED
QUESTIONS AND ANSWERS|| ALREADY
GRADED A+ || GUARANTEED PASS || LATEST
UPDATE 2025
Don is called out to start up a new natural gas fired convection steamer. He
finds that the burner flames are blue with yellow tips. He should:
A) Check off the startup sheet as having a proper flame
B) Adjust the primary air until he gets a soft wavy flame with no inner blue
cone
C) Adjust the primary air until he gets a blue flame with a soft inner blue core
D) Adjust the primary air for a sharp blue flame with a sharp blue/white inner
core - ANSWER-D
Vern is working on an infrared broiler. It has had a history of burner failure due
to decayed insulation between the burners and broken ceramic tiles. He checks
the gas pressure and the pressure is 7" w.c. on natural gas. The most likely cause
of the excessive failure is:
A) Excessive gas pressure
B) Insufficient gas pressure
C) Insufficient secondary air to cool the burners
D) Just a bad batch of burners - ANSWER-A
Harry is called out to service a range oven. The customer says the pilot will not
stay lit, and it always smells like gas fumes when it is on. Looking through the
peep hole in the kick plate he notices that the pilot light is fine, but as the burner
is on for a short while the flames lift and float right off the burner. The problem
is ______.
A) A primary air adjustment is needed
,B) A secondary air adjustment is needed
C) There is insufficient primary air probably due to a flue restriction or make up
air problem
D) There is insufficient secondary air probably due to a flue restriction or make
up air problem - ANSWER-D
Carl is servicing a natural gas broiler that has a problem with the pilot burner
getting clogged frequently. On past occasions other techs have cleaned the pilot
burner and copper pilot tubing, but the problem reoccurs in a few days: Carl
needs to _______.
A) Install a new pilot burner
B) Install a new pilot burner and new copper pilot tube
C) Install a new aluminum pilot tube, and clean or replace the pilot burner
D) Install a new copper tube with a pilot filter in the line - ANSWER-C
Tom is servicing a high efficiency fryer with electronic ignition. The fuse is
blown on the
Honeywell ignition module. Tom should _____.
A) Replace the shorted module
B) Check the gas valve for shorts
C) Check the sensor for shorts
D) Find out why the control compartment is overheating causing the blown fuse
- ANSWER-B
Terri is called out to Joe's pizza. The fire department has closed them down
because people were getting sick and there were strong fumes coming from the
oven. When she enters the kitchen through the back door, the door slams close
behind her. The problem is ______.
A) Positive air pressure caused by excessive makeup air
B) Negative air pressure caused by insufficient makeup air
C) The exhaust fan is not removing enough air
, D) There is a gas leak in the oven - ANSWER-C
Jack' Steak House has an infrared cheese melter mounted on the wall. The gas
line exits the top and a gas pressure regulator is mounted right there. The
regulator fails about every six weeks.
The likely problem is ________.
A) A batch of bad regulators
B) The high ambient heat where the regulator is mounted
C) The vertical mounting position of the regulator
D) Border line low incoming gas pressure - ANSWER-B
A 1 ½" black Iron Gate line running for 50 feet can supply 670 cubic feet of
natural gas per hour, or approximately 670,000 BTU's. A gas pressure regulator
is rated at 800,000 BTU and is 1" N.P.T. Another regulator is rated at 1,200,000
BTU's and is 1 ½" N.P.T. Which regulator must you use?
A) Either will work as they both have the BTU capacity
B) The 1" because it will be much less expensive
C) The 1 ½" because you must maintain pipe size to prevent creating
restrictions
D) Neither would be the right regulator - ANSWER-C
A gas pressure regulator is shipped alone with most LP fryers, either separate or
as part of the combination gas valve. This is a secondary regulator meaning that
___________.
A) It can be connected directly to an LP tank
B) It can be connected only after the pressure regulator on the LP tank
C) It can be used only if two fryers are being installed
D) It can be used only if the pipe size is 1/2" - ANSWER-B
Natural gas when produced from the ground has _______ odor.
QUESTIONS AND ANSWERS|| ALREADY
GRADED A+ || GUARANTEED PASS || LATEST
UPDATE 2025
Don is called out to start up a new natural gas fired convection steamer. He
finds that the burner flames are blue with yellow tips. He should:
A) Check off the startup sheet as having a proper flame
B) Adjust the primary air until he gets a soft wavy flame with no inner blue
cone
C) Adjust the primary air until he gets a blue flame with a soft inner blue core
D) Adjust the primary air for a sharp blue flame with a sharp blue/white inner
core - ANSWER-D
Vern is working on an infrared broiler. It has had a history of burner failure due
to decayed insulation between the burners and broken ceramic tiles. He checks
the gas pressure and the pressure is 7" w.c. on natural gas. The most likely cause
of the excessive failure is:
A) Excessive gas pressure
B) Insufficient gas pressure
C) Insufficient secondary air to cool the burners
D) Just a bad batch of burners - ANSWER-A
Harry is called out to service a range oven. The customer says the pilot will not
stay lit, and it always smells like gas fumes when it is on. Looking through the
peep hole in the kick plate he notices that the pilot light is fine, but as the burner
is on for a short while the flames lift and float right off the burner. The problem
is ______.
A) A primary air adjustment is needed
,B) A secondary air adjustment is needed
C) There is insufficient primary air probably due to a flue restriction or make up
air problem
D) There is insufficient secondary air probably due to a flue restriction or make
up air problem - ANSWER-D
Carl is servicing a natural gas broiler that has a problem with the pilot burner
getting clogged frequently. On past occasions other techs have cleaned the pilot
burner and copper pilot tubing, but the problem reoccurs in a few days: Carl
needs to _______.
A) Install a new pilot burner
B) Install a new pilot burner and new copper pilot tube
C) Install a new aluminum pilot tube, and clean or replace the pilot burner
D) Install a new copper tube with a pilot filter in the line - ANSWER-C
Tom is servicing a high efficiency fryer with electronic ignition. The fuse is
blown on the
Honeywell ignition module. Tom should _____.
A) Replace the shorted module
B) Check the gas valve for shorts
C) Check the sensor for shorts
D) Find out why the control compartment is overheating causing the blown fuse
- ANSWER-B
Terri is called out to Joe's pizza. The fire department has closed them down
because people were getting sick and there were strong fumes coming from the
oven. When she enters the kitchen through the back door, the door slams close
behind her. The problem is ______.
A) Positive air pressure caused by excessive makeup air
B) Negative air pressure caused by insufficient makeup air
C) The exhaust fan is not removing enough air
, D) There is a gas leak in the oven - ANSWER-C
Jack' Steak House has an infrared cheese melter mounted on the wall. The gas
line exits the top and a gas pressure regulator is mounted right there. The
regulator fails about every six weeks.
The likely problem is ________.
A) A batch of bad regulators
B) The high ambient heat where the regulator is mounted
C) The vertical mounting position of the regulator
D) Border line low incoming gas pressure - ANSWER-B
A 1 ½" black Iron Gate line running for 50 feet can supply 670 cubic feet of
natural gas per hour, or approximately 670,000 BTU's. A gas pressure regulator
is rated at 800,000 BTU and is 1" N.P.T. Another regulator is rated at 1,200,000
BTU's and is 1 ½" N.P.T. Which regulator must you use?
A) Either will work as they both have the BTU capacity
B) The 1" because it will be much less expensive
C) The 1 ½" because you must maintain pipe size to prevent creating
restrictions
D) Neither would be the right regulator - ANSWER-C
A gas pressure regulator is shipped alone with most LP fryers, either separate or
as part of the combination gas valve. This is a secondary regulator meaning that
___________.
A) It can be connected directly to an LP tank
B) It can be connected only after the pressure regulator on the LP tank
C) It can be used only if two fryers are being installed
D) It can be used only if the pipe size is 1/2" - ANSWER-B
Natural gas when produced from the ground has _______ odor.
