HVAC Final Exam Questions and
Answers | Latest Version | 2025/2026 |
Correct & Verified
Why is regular maintenance important for HVAC systems?
✔✔To ensure efficiency, prevent breakdowns, and extend equipment lifespan.
What does a thermostat control in a heating system?
✔✔The temperature by turning the system on or off.
What is the purpose of a furnace blower motor?
✔✔To circulate warm air through the ductwork.
Why is refrigerant critical in air conditioning systems?
✔✔It absorbs and releases heat to cool indoor spaces.
What is the role of an evaporator coil?
✔✔To absorb heat from indoor air into the refrigerant.
What is the function of a condenser coil?
✔✔To release heat from refrigerant to the outside air.
Why is airflow important in HVAC systems?
1
, ✔✔To maintain proper heat transfer and indoor air quality.
What is superheat in refrigeration?
✔✔The temperature of refrigerant vapor above its boiling point.
What is subcooling in refrigeration?
✔✔The temperature of liquid refrigerant below its condensation point.
What does SEER measure in air conditioners?
✔✔Seasonal Energy Efficiency Ratio, or efficiency over a cooling season.
Why should air filters be replaced regularly?
✔✔To prevent restricted airflow and maintain indoor air quality.
What is the purpose of a duct system?
✔✔To distribute conditioned air throughout the building.
What is a common cause of ice on an evaporator coil?
✔✔Low airflow or low refrigerant.
What is the role of a compressor in HVAC?
✔✔To pressurize refrigerant and circulate it through the system.
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Answers | Latest Version | 2025/2026 |
Correct & Verified
Why is regular maintenance important for HVAC systems?
✔✔To ensure efficiency, prevent breakdowns, and extend equipment lifespan.
What does a thermostat control in a heating system?
✔✔The temperature by turning the system on or off.
What is the purpose of a furnace blower motor?
✔✔To circulate warm air through the ductwork.
Why is refrigerant critical in air conditioning systems?
✔✔It absorbs and releases heat to cool indoor spaces.
What is the role of an evaporator coil?
✔✔To absorb heat from indoor air into the refrigerant.
What is the function of a condenser coil?
✔✔To release heat from refrigerant to the outside air.
Why is airflow important in HVAC systems?
1
, ✔✔To maintain proper heat transfer and indoor air quality.
What is superheat in refrigeration?
✔✔The temperature of refrigerant vapor above its boiling point.
What is subcooling in refrigeration?
✔✔The temperature of liquid refrigerant below its condensation point.
What does SEER measure in air conditioners?
✔✔Seasonal Energy Efficiency Ratio, or efficiency over a cooling season.
Why should air filters be replaced regularly?
✔✔To prevent restricted airflow and maintain indoor air quality.
What is the purpose of a duct system?
✔✔To distribute conditioned air throughout the building.
What is a common cause of ice on an evaporator coil?
✔✔Low airflow or low refrigerant.
What is the role of a compressor in HVAC?
✔✔To pressurize refrigerant and circulate it through the system.
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