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NATE Gas Heating Exam 2026 |
Comprehensive Questions And
Correct Answers
Carbon monoxide is a:
A: Product of incomplete combustion
B: Poisonous gas
C: Odorless gas
D: All of the above are correct - correct-answer -D: All of the above are correct
The chemical symbol for carbon monoxide is:
A: CO2
B: CO
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C: H2O
D: NH3 - correct-answer -B: CO
Selecting a lower speed tap setting on a furnace indoor blower motor will cause:
A: The temperature rise through the furnace to increase
B: The temperature rise through the furnace to decrease
C: The temperature rise through the furnace will not be affected
D: The furnace to act as a humidifier - correct-answer -A: The temperature rise
through the furnace to increase
"Carry over" channels or "cross overs" are used to:
A: Carry unused excess fuel back to the flue where it is sent up the stack
B: Carry primary air to the heat exchanger
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C: Carry secondary air to the heat exchanger
D: Carry the flame from the first burner that lights to the remaining burners -
correct-answer -D: Carry the flame from the first burner that lights to the
remaining burners
Modern high-efficiency burners use combustion blowers. What are the two major
types of combustion blowers?
A: Induced draft and forced draft
B: High pressure and low pressure
C: Impeller type and centrifugal type
D: Liquid and vapor types - correct-answer -A: Induced draft and forced draft
The purpose of the combustion blower is to:
A: Cause an adequate amount of oxygen-rich air to mix with the fuel for better
combustion
NATE Gas Heating Exam 2026 |
Comprehensive Questions And
Correct Answers
Carbon monoxide is a:
A: Product of incomplete combustion
B: Poisonous gas
C: Odorless gas
D: All of the above are correct - correct-answer -D: All of the above are correct
The chemical symbol for carbon monoxide is:
A: CO2
B: CO
,2|Page
C: H2O
D: NH3 - correct-answer -B: CO
Selecting a lower speed tap setting on a furnace indoor blower motor will cause:
A: The temperature rise through the furnace to increase
B: The temperature rise through the furnace to decrease
C: The temperature rise through the furnace will not be affected
D: The furnace to act as a humidifier - correct-answer -A: The temperature rise
through the furnace to increase
"Carry over" channels or "cross overs" are used to:
A: Carry unused excess fuel back to the flue where it is sent up the stack
B: Carry primary air to the heat exchanger
, 3|Page
C: Carry secondary air to the heat exchanger
D: Carry the flame from the first burner that lights to the remaining burners -
correct-answer -D: Carry the flame from the first burner that lights to the
remaining burners
Modern high-efficiency burners use combustion blowers. What are the two major
types of combustion blowers?
A: Induced draft and forced draft
B: High pressure and low pressure
C: Impeller type and centrifugal type
D: Liquid and vapor types - correct-answer -A: Induced draft and forced draft
The purpose of the combustion blower is to:
A: Cause an adequate amount of oxygen-rich air to mix with the fuel for better
combustion
