Gas CFESA Practice Test – 2025/2026 Updated
Study Guide & Practice Questions | 100% Pass
Guarantee
The purpose of a draft hood/draft diverter is_______?
A) To prevent drafts from entering the burner compartment that comes from the power
cent
hoods.
B) To prevent the combustion chamber from overheating, and allowing air to come
down the
vent pipe into the room.
C) To allow the flue to control the amount of secondary air drawn in instead of the vent
pipe,
and to prevent air from coming back down the vent into the combustion chamber
D) To allow the vent pipe to control the amount of secondary air drawn into the
combustion
chamber as designed by its height above the hood. - correct answerC
The two primary functions of the flue are____?
A) The remove combustion byproducts and heat from the equipment
B) To create a draft to pull in secondary air and remove the byproducts form the
combustion
chamber
C) To create a draft to keep the burners cool and remove byproducts from the cooking
area
D) To remove the excessive heat to keep the burners, and cooking surface from
overheating - correct answerB
To solve unusual venting problems like negative pressure, high winds, long vents, the
installe
should use_____?
A) A larger size vent pipe
B) Vent outlets
C) Vent top turbines
D) A draft hood - correct answerD
What is a bypass flame?
A) The smallest flame that will keep the burners lit after the gas thermostat has reached
the
temperature set point
B) A flame that is 3/8" tall after the thermostat shuts off
,C) A flame left on the burner to keep the pilot form going out
D) A flame to a special part of the burner after the main burner goes off - correct
answerA
The primary purpose of a vent on a regulator is to:
A) Vent leaking gas
B) Allow diaphragm movement
C) Allow high pressure
D) Monitor flow - correct answerB
A properly burning infrared ceramic burner will look______?
A) Blue
B) Bright reddish orange
C) Dull red
D) Blue with a tint of orange - correct answerB
Vent lines are required on regulators above 1" and must be vented:
A) A pilot flame
B) An open flame within 2 feet
C) A working flue or exhaust system
D) The outside atmosphere, above the snow line - correct answerD
What is the proper flame current for an ignition module?
A) Always 3 or more microamps
B) Always ¼ or more microamps
C) It depends on the module manufacturer
D) Always 2 or more microamps - correct answerC
Primary air is the air______?
A) That surrounds the burner
B) That enters the burner though the venture
C) Is the air that is vented through the exhaust system
D) That must always have a pressure greater than the incoming gas pressure - correct
answerB
Every time a gas fired convection oven shuts off the gas flow to the burners there is a
loud pop.
The oven is rated for and using LP gas. The noise is called_____, and can be reduced
by____ the
burner air shutters more.
A) Extinction pop, opening
B) Delayed ignition, closing
C) Delayed ignition, opening
D) Extinction pop and by closing - correct answerD
If a leak develops in an LP gas line, where is the gas likely to go?
, A) Out the exhaust system
B) To the lowest level in the room
C) Up to the ceiling area
D) Out of the kitchen under the door - correct answerB
The approximate amount of BTU's produced by burning one cubic foot of natural gas is?
A) 10,000
B) 2500
C) 750
D) 1000 - correct answerD
The normal operating pressure of LP gas is_____?
A) 10-15 psi
B) 3-7 psi
C) 10-11 in WC"
D) 3-7 in WC" - correct answerC
The normal operating pressure of a typical natural gas type burner is approximately:
A) 15-25 psi
B) 3-4 psi
C) 10-11 in WC"
D) 3.5-7 in WC" - correct answerD
Make up air is:
A) The air that enters the venture of the burner
B) The air that mixes with the gas at the burner ports
C) The air that enters the room from the outside
D) The air that is taken out through the vent - correct answerC
LP gas, at the appliance, is_______?
A) Heavier than air
B) Light yellow
C) Lighter than air
D) Odorless - correct answerA
Ideally to burn one cubic foot of LP gas approximately______ cubic feet of air is
required.
A) 100
B) 24
C) 10
D) 44 - correct answerB
Natural gas coming out of a gas line piped into a building is:
A) Heavier than air
B) Light yellow
C) Lighter than air
Study Guide & Practice Questions | 100% Pass
Guarantee
The purpose of a draft hood/draft diverter is_______?
A) To prevent drafts from entering the burner compartment that comes from the power
cent
hoods.
B) To prevent the combustion chamber from overheating, and allowing air to come
down the
vent pipe into the room.
C) To allow the flue to control the amount of secondary air drawn in instead of the vent
pipe,
and to prevent air from coming back down the vent into the combustion chamber
D) To allow the vent pipe to control the amount of secondary air drawn into the
combustion
chamber as designed by its height above the hood. - correct answerC
The two primary functions of the flue are____?
A) The remove combustion byproducts and heat from the equipment
B) To create a draft to pull in secondary air and remove the byproducts form the
combustion
chamber
C) To create a draft to keep the burners cool and remove byproducts from the cooking
area
D) To remove the excessive heat to keep the burners, and cooking surface from
overheating - correct answerB
To solve unusual venting problems like negative pressure, high winds, long vents, the
installe
should use_____?
A) A larger size vent pipe
B) Vent outlets
C) Vent top turbines
D) A draft hood - correct answerD
What is a bypass flame?
A) The smallest flame that will keep the burners lit after the gas thermostat has reached
the
temperature set point
B) A flame that is 3/8" tall after the thermostat shuts off
,C) A flame left on the burner to keep the pilot form going out
D) A flame to a special part of the burner after the main burner goes off - correct
answerA
The primary purpose of a vent on a regulator is to:
A) Vent leaking gas
B) Allow diaphragm movement
C) Allow high pressure
D) Monitor flow - correct answerB
A properly burning infrared ceramic burner will look______?
A) Blue
B) Bright reddish orange
C) Dull red
D) Blue with a tint of orange - correct answerB
Vent lines are required on regulators above 1" and must be vented:
A) A pilot flame
B) An open flame within 2 feet
C) A working flue or exhaust system
D) The outside atmosphere, above the snow line - correct answerD
What is the proper flame current for an ignition module?
A) Always 3 or more microamps
B) Always ¼ or more microamps
C) It depends on the module manufacturer
D) Always 2 or more microamps - correct answerC
Primary air is the air______?
A) That surrounds the burner
B) That enters the burner though the venture
C) Is the air that is vented through the exhaust system
D) That must always have a pressure greater than the incoming gas pressure - correct
answerB
Every time a gas fired convection oven shuts off the gas flow to the burners there is a
loud pop.
The oven is rated for and using LP gas. The noise is called_____, and can be reduced
by____ the
burner air shutters more.
A) Extinction pop, opening
B) Delayed ignition, closing
C) Delayed ignition, opening
D) Extinction pop and by closing - correct answerD
If a leak develops in an LP gas line, where is the gas likely to go?
, A) Out the exhaust system
B) To the lowest level in the room
C) Up to the ceiling area
D) Out of the kitchen under the door - correct answerB
The approximate amount of BTU's produced by burning one cubic foot of natural gas is?
A) 10,000
B) 2500
C) 750
D) 1000 - correct answerD
The normal operating pressure of LP gas is_____?
A) 10-15 psi
B) 3-7 psi
C) 10-11 in WC"
D) 3-7 in WC" - correct answerC
The normal operating pressure of a typical natural gas type burner is approximately:
A) 15-25 psi
B) 3-4 psi
C) 10-11 in WC"
D) 3.5-7 in WC" - correct answerD
Make up air is:
A) The air that enters the venture of the burner
B) The air that mixes with the gas at the burner ports
C) The air that enters the room from the outside
D) The air that is taken out through the vent - correct answerC
LP gas, at the appliance, is_______?
A) Heavier than air
B) Light yellow
C) Lighter than air
D) Odorless - correct answerA
Ideally to burn one cubic foot of LP gas approximately______ cubic feet of air is
required.
A) 100
B) 24
C) 10
D) 44 - correct answerB
Natural gas coming out of a gas line piped into a building is:
A) Heavier than air
B) Light yellow
C) Lighter than air
