1|Page
NATE GAS HEAT 2025/2025 EXAM WITH ALL
COMPLETE QUESTIONS AND DETAILED CORRECT
ANSWERS (VERIFIED) FOR GUARANTEED PASS
TOP-RATED A+.
NATE GAS HEAT
Ace all your NATE Gas Heat Exam with confidence. This
comprehensive resource includes updated practice questions,
troubleshooting scenarios covering installation, maintenance, and
safety procedures for gas heating systems. Perfect for HVAC
technicians preparing for NATE certification.
Since 1992, the United States Department of Energy has
required that all furnaces sold and installed from that date on
must have an AFUE of no less than:
A: 70%
B: 75%
C: 78%
D: 80% ...... ANSWER ....... C: 78%
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Many pre-1992 furnaces have efficiencies around _______.
A: 10%
B: 40%
C: 60%
D: 80% ...... ANSWER ....... C: 60%
Today, furnaces with AFUE ratings greater than _____ are
available.
A: 85%
B: 90%
C: 100%
D: 110% ...... ANSWER ....... B: 90%
A thermocouple is used with:
A: Intermittent pilot systems
B: Direct spark ignition systems
C: Glow coil ignition systems
D: Standing pilot ignition systems ...... ANSWER .......
D: Standing pilot ignition systems
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The purpose of the gas pressure regulator is to:
A: Keep the color of the flame constant
B: Keep the high limit switch from tripping
C: Maintain a constant gas pressure at the burner
D: Allow the gas valve to operate smoothly and accurately
...... ANSWER ....... C: Maintain a constant gas
pressure at the burner
The instrument used to measure outlet gas pressure is the:
A: Velometer
B: Anemometer
C: Monometer
D: Draft gauge ...... ANSWER ....... C: Monometer
The regulator on a natural gas furnace should be adjusted to
supply _____ inches of pressure at the burners.
A: 11"
B: 10"
C: 3.5"
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D: 2" ...... ANSWER ....... C: 3.5"
Burning one cubic foot of natural gas releases approximately
_____ btu.
A: 800
B: 1,050
C: 12,000
D: 15,000 ...... ANSWER ....... B: 1,050
Under ideal conditions natural gas has an ignition
temperature of _______ degrees F and a burning temperature
of ________ degrees F.
A: 800 degrees, 1000 degrees
B: 1,100 degrees, 3,500 degrees
C: 1,100 degrees, 5,000 degrees
D: 2,500 degrees, 8,000 degrees ...... ANSWER ....... B:
1,100 degrees, 3,500 degrees
Propane and butane are both:
A: Lighter than air
NATE GAS HEAT 2025/2025 EXAM WITH ALL
COMPLETE QUESTIONS AND DETAILED CORRECT
ANSWERS (VERIFIED) FOR GUARANTEED PASS
TOP-RATED A+.
NATE GAS HEAT
Ace all your NATE Gas Heat Exam with confidence. This
comprehensive resource includes updated practice questions,
troubleshooting scenarios covering installation, maintenance, and
safety procedures for gas heating systems. Perfect for HVAC
technicians preparing for NATE certification.
Since 1992, the United States Department of Energy has
required that all furnaces sold and installed from that date on
must have an AFUE of no less than:
A: 70%
B: 75%
C: 78%
D: 80% ...... ANSWER ....... C: 78%
,2|Page
Many pre-1992 furnaces have efficiencies around _______.
A: 10%
B: 40%
C: 60%
D: 80% ...... ANSWER ....... C: 60%
Today, furnaces with AFUE ratings greater than _____ are
available.
A: 85%
B: 90%
C: 100%
D: 110% ...... ANSWER ....... B: 90%
A thermocouple is used with:
A: Intermittent pilot systems
B: Direct spark ignition systems
C: Glow coil ignition systems
D: Standing pilot ignition systems ...... ANSWER .......
D: Standing pilot ignition systems
,3|Page
The purpose of the gas pressure regulator is to:
A: Keep the color of the flame constant
B: Keep the high limit switch from tripping
C: Maintain a constant gas pressure at the burner
D: Allow the gas valve to operate smoothly and accurately
...... ANSWER ....... C: Maintain a constant gas
pressure at the burner
The instrument used to measure outlet gas pressure is the:
A: Velometer
B: Anemometer
C: Monometer
D: Draft gauge ...... ANSWER ....... C: Monometer
The regulator on a natural gas furnace should be adjusted to
supply _____ inches of pressure at the burners.
A: 11"
B: 10"
C: 3.5"
, 4|Page
D: 2" ...... ANSWER ....... C: 3.5"
Burning one cubic foot of natural gas releases approximately
_____ btu.
A: 800
B: 1,050
C: 12,000
D: 15,000 ...... ANSWER ....... B: 1,050
Under ideal conditions natural gas has an ignition
temperature of _______ degrees F and a burning temperature
of ________ degrees F.
A: 800 degrees, 1000 degrees
B: 1,100 degrees, 3,500 degrees
C: 1,100 degrees, 5,000 degrees
D: 2,500 degrees, 8,000 degrees ...... ANSWER ....... B:
1,100 degrees, 3,500 degrees
Propane and butane are both:
A: Lighter than air
