Gas CFESA Practice Test - Questions And Expert
Answers
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. Right Ans - C
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 Right Ans - B
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 Right Ans - D
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
Right Ans - A
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 Right Ans - B
A properly burning infrared ceramic burner will look______?
A) Blue
B) Bright reddish orange
C) Dull red
D) Blue with a tint of orange Right Ans - B
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 Right Ans - D
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 Right Ans - C
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
Right Ans - B
, 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 Right Ans - D
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 Right Ans - B
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 Right Ans - D
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" Right Ans - C
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" Right Ans - D
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
Answers
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. Right Ans - C
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 Right Ans - B
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 Right Ans - D
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
Right Ans - A
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 Right Ans - B
A properly burning infrared ceramic burner will look______?
A) Blue
B) Bright reddish orange
C) Dull red
D) Blue with a tint of orange Right Ans - B
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 Right Ans - D
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 Right Ans - C
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
Right Ans - B
, 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 Right Ans - D
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 Right Ans - B
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 Right Ans - D
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" Right Ans - C
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" Right Ans - D
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
