NATE GAS HEATING EXAM ACTUAL EXAM 2026
| ALL QUESTIONS AND CORRECT ANSWERS |
VERIFIED ANSWERS | UPDATED VERSION
Heat transfers from an object or area at a higher temperature to an
object or area at a lower temperature. A heated heat exchanger
transfers heat to the air by:
A: Conduction
B: Natural convection
C: Radiation
D: Forced convection ---------CORRECT ANSWER-----------------D: Forced
convection
The voltage that creates a spark on a spark ignition system is
approximately:
A: 240 volts
,B: 5,000 volts
C: 15,000 volts
D: 25,000 volts ---------CORRECT ANSWER-----------------C: 15,000 volts
The capacity of a natural gas furnace is de-rated by _______ for every
1000 feet above sea level:
A: 1%
B: 2%
C: 3%
D: 4% ---------CORRECT ANSWER-----------------D: 4%
A crack in a heat exchanger can:
A: Allow combustion gases to mix with the space air
,B: Prevent the heat from effectively transferring to the air
C: Cause the high-limit control to shut the furnace down
D: Cause the furnace to catch on fire ---------CORRECT ANSWER-----------
------A: Allow combustion gases to mix with the space air
Gas valves operate on what voltage?
A: 12 volts
B: 24 volts
C: 120 volts
D: 230 volts ---------CORRECT ANSWER-----------------B: 24 volts
Mid-efficiency furnaces operate with flue gas temperatures between:
, A: 275 and 360 degrees
B: 200 and 500 degrees
C: 100 and 275 degrees
D: 80 and 100 degrees ---------CORRECT ANSWER-----------------A: 275
and 360 degrees
High-efficiency furnaces operate with flue gas temperatures between:
A: 275 and 360 degrees
B: 200 and 500 degrees
C: 100 and 275 degrees
D: 80 and 100 degrees ---------CORRECT ANSWER-----------------C: 100
and 275 degrees
"B" vent is:
| ALL QUESTIONS AND CORRECT ANSWERS |
VERIFIED ANSWERS | UPDATED VERSION
Heat transfers from an object or area at a higher temperature to an
object or area at a lower temperature. A heated heat exchanger
transfers heat to the air by:
A: Conduction
B: Natural convection
C: Radiation
D: Forced convection ---------CORRECT ANSWER-----------------D: Forced
convection
The voltage that creates a spark on a spark ignition system is
approximately:
A: 240 volts
,B: 5,000 volts
C: 15,000 volts
D: 25,000 volts ---------CORRECT ANSWER-----------------C: 15,000 volts
The capacity of a natural gas furnace is de-rated by _______ for every
1000 feet above sea level:
A: 1%
B: 2%
C: 3%
D: 4% ---------CORRECT ANSWER-----------------D: 4%
A crack in a heat exchanger can:
A: Allow combustion gases to mix with the space air
,B: Prevent the heat from effectively transferring to the air
C: Cause the high-limit control to shut the furnace down
D: Cause the furnace to catch on fire ---------CORRECT ANSWER-----------
------A: Allow combustion gases to mix with the space air
Gas valves operate on what voltage?
A: 12 volts
B: 24 volts
C: 120 volts
D: 230 volts ---------CORRECT ANSWER-----------------B: 24 volts
Mid-efficiency furnaces operate with flue gas temperatures between:
, A: 275 and 360 degrees
B: 200 and 500 degrees
C: 100 and 275 degrees
D: 80 and 100 degrees ---------CORRECT ANSWER-----------------A: 275
and 360 degrees
High-efficiency furnaces operate with flue gas temperatures between:
A: 275 and 360 degrees
B: 200 and 500 degrees
C: 100 and 275 degrees
D: 80 and 100 degrees ---------CORRECT ANSWER-----------------C: 100
and 275 degrees
"B" vent is:
