NATE Gas Heating Exam Questions 2026/2027 | Consisting Of 50 Questions With Verified Answers From Experts

NATE Gas Heating Exam Questions 2026/2027 | Consisting Of 50 Questions With Verified Answers From Experts

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NATE Gas Heating Exam Questions and Answers

1. 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%✔✔78%

2. Many pre-1992

furnaces have efficiencies around .

A: 10%

B: 40%

C: 60%

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D: 80%✔✔60%

3. Today, furnaces

with AFUE ratings greater than are available.

A: 85%

B: 90%

C: 100%

D: 110%✔✔90%

4. A thermocouple is used with:

A: Intermittent pilot systems

B: Direct spark ignition

systems C: Glow coil ignition

systems

D: Standing pilot ignition systems✔✔Standing pilot ignition systems

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5. 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✔✔Maintain

a constant gas pressure at the burner

6. The instrument used to measure outlet gas pressure is

the✔✔Velometer

B: Anemometer

C: Monometer

D: Draft gauge✔✔Monometer

7. he regulator on a natural gas furnace should be adjusted to supply

inches of pressure at the burners.

A: 11"

B: 10"

C: 3.5"

D: 2"✔✔3.5"