HVAC Practice Exam Questions and Answers
Question 1
Paula is a technician working on the HVAC system at a mall that's controlled by a digital direct control system. She's
checking area conditions with a type of electronic sensor that changes its resistance based on temperature. What's the
sensor?
Correct Answer
Thermistor
Question 2
Nathan is an HVACR technician working on a heat pump refrigeration system. When the heat pump is operating in a
cooling cycle, what's the function of the outside unit?
Correct Answer
Discharge the heat picked up by the evaporator.
Question 3
What are the four components of indoor comfort control?
Correct Answer
Temperature, humidity, purity, and air flow/volume
Page 1 of 7
, Question 4
The Galvins want to modernize their home's heating system. Their current system is hydroponic and fueled by fossil fuels.
What are the four most widely used fossil fuels?
Correct Answer
Coal, natural gas, propane, fuel oil
Question 5
The Watkins have an air conditioner with oil furnace system in their home. When it's time to cool the house, they turn off
the furnace's oil burner, which then turns on the air-conditioning system. This will supply _______ to the evaporator coil.
Correct Answer
liquid refrigerant
Question 6
An HVACR service technician is applying a desiccant to a device in the heating system. What component of the system is
the technician working on?
Correct Answer
Humidity control
Question 7
Kelsey is seeking a career as an HVACR technician. What certification must she have before she can start working?
Correct Answer
EPA 608
Page 2 of 7
Question 1
Paula is a technician working on the HVAC system at a mall that's controlled by a digital direct control system. She's
checking area conditions with a type of electronic sensor that changes its resistance based on temperature. What's the
sensor?
Correct Answer
Thermistor
Question 2
Nathan is an HVACR technician working on a heat pump refrigeration system. When the heat pump is operating in a
cooling cycle, what's the function of the outside unit?
Correct Answer
Discharge the heat picked up by the evaporator.
Question 3
What are the four components of indoor comfort control?
Correct Answer
Temperature, humidity, purity, and air flow/volume
Page 1 of 7
, Question 4
The Galvins want to modernize their home's heating system. Their current system is hydroponic and fueled by fossil fuels.
What are the four most widely used fossil fuels?
Correct Answer
Coal, natural gas, propane, fuel oil
Question 5
The Watkins have an air conditioner with oil furnace system in their home. When it's time to cool the house, they turn off
the furnace's oil burner, which then turns on the air-conditioning system. This will supply _______ to the evaporator coil.
Correct Answer
liquid refrigerant
Question 6
An HVACR service technician is applying a desiccant to a device in the heating system. What component of the system is
the technician working on?
Correct Answer
Humidity control
Question 7
Kelsey is seeking a career as an HVACR technician. What certification must she have before she can start working?
Correct Answer
EPA 608
Page 2 of 7
