NATE Gas Heating Exam2024/Updated/50 Questions and Answers/A+ Rated

NATE Gas Heating
Exam2024/Updated/50
Questions and Answers/A+
Rated
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% - -C: 78%

-Many pre-1992 furnaces have efficiencies around _______.

A: 10%

B: 40%

C: 60%

D: 80% - -C: 60%

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

A: 85%

B: 90%

C: 100%

D: 110% - -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 - -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 - -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 - -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" - -C: 3.5"

-Burning one cubic foot of natural gas releases approximately _____ btu.

A: 800

B: 1,050

C: 12,000

D: 15,000 - -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