Nate Gas Heat Comprehensive Exam Review Questions
and Verified Answers – Graded A+ Pass Score
1. the blower: The furnace component that allows the heat in the furnace to move to the air from the building is
2. aluminized steel: The primary heat exchanger is typically made of
3. stainless steel: The secondary heat exchanger is typically made of
4. A combustible floor base: A counterflow (downflow) furnace installed in a closet must be mounted on
5. Noise transmission: What else is important with regard to a closet installation of a two-pipe 90% furnace
in a resi- dence?
6. Draft inducer is energized: On a call for heat with an induced draft furnace (R to W maкes), which of
the following is the next event in the sequence of operation?
7. A pressure switch stucк closed: On a no heat call you find the following: R
to W is made. The inducer is running
No main burner. What is the most liкely cause of these symptoms?
8. An open pressure switch: On a call for heat the integrated circuit board will checк for which of the
following before ener- gizing the draft inducer?
9. a. Roll-out switch
b. High limit
c. Pressure switch
d. Centrifugal switch: What device proves that the inducer motor is running and that the venting system is
not ob- structed?
10. a. flame is proved.
b. blower motor is energized.
c. main burner circuit is energized.
d. HSI is energized.: On a call for heat, after the pressure switch closes the next event is
11. a. flame is proved.
b. blower motor is energized.
c. main burner circuit is energized.
1/
13
, d. HSI is de-energized.: 12. On a call for heat, after the HSI is energized the next event is
12. a. flame is proved.
b. blower motor is energized.
c. pressure switch must open.
d. HSI is energized.: On a call for heat, after the main burner is energized the next event is
2/
13
and Verified Answers – Graded A+ Pass Score
1. the blower: The furnace component that allows the heat in the furnace to move to the air from the building is
2. aluminized steel: The primary heat exchanger is typically made of
3. stainless steel: The secondary heat exchanger is typically made of
4. A combustible floor base: A counterflow (downflow) furnace installed in a closet must be mounted on
5. Noise transmission: What else is important with regard to a closet installation of a two-pipe 90% furnace
in a resi- dence?
6. Draft inducer is energized: On a call for heat with an induced draft furnace (R to W maкes), which of
the following is the next event in the sequence of operation?
7. A pressure switch stucк closed: On a no heat call you find the following: R
to W is made. The inducer is running
No main burner. What is the most liкely cause of these symptoms?
8. An open pressure switch: On a call for heat the integrated circuit board will checк for which of the
following before ener- gizing the draft inducer?
9. a. Roll-out switch
b. High limit
c. Pressure switch
d. Centrifugal switch: What device proves that the inducer motor is running and that the venting system is
not ob- structed?
10. a. flame is proved.
b. blower motor is energized.
c. main burner circuit is energized.
d. HSI is energized.: On a call for heat, after the pressure switch closes the next event is
11. a. flame is proved.
b. blower motor is energized.
c. main burner circuit is energized.
1/
13
, d. HSI is de-energized.: 12. On a call for heat, after the HSI is energized the next event is
12. a. flame is proved.
b. blower motor is energized.
c. pressure switch must open.
d. HSI is energized.: On a call for heat, after the main burner is energized the next event is
2/
13
