NATE Gas Heating Exam – Questions With Solutions

NATE Gas Heating Exam – Questions With
Solutions
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% Correct Answer - C: 78%

Many pre-1992 furnaces have efficiencies around _______.

A: 10%

B: 40%

C: 60%

D: 80% Correct Answer - C: 60%

Today, furnaces with AFUE ratings greater than _____ are available.

A: 85%

B: 90%

C: 100%

D: 110% Correct 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 Correct Answer - D: Standing pilot
ignition systems

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 Correct 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 Correct 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"

D: 2" Correct Answer - C: 3.5"