HVAC EXCELLENCE PROFESSIONAL
TECHNICIAN HVAC CERTIFICATION
PRACTICE EXAM QUESTION AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. What does HVAC stand for?
A. Heating, Ventilation, and Air Conditioning
B. Heat, Vacuum, and A/C
C. High Velocity Air Circulation
D. Home Ventilation and Airflow
Rationale: HVAC refers to the systems that control indoor environmental
comfort by heating, ventilating, and air conditioning.
2. Which component removes heat from indoor air?
A. Compressor
B. Evaporator Coil
C. Condenser Coil
D. Expansion Valve
Rationale: The evaporator coil absorbs heat from indoor air to cool it.
3. The function of a compressor in an HVAC system is to:
A. Remove humidity
B. Cool the air
C. Increase refrigerant pressure
D. Filter the air
Rationale: Compressors raise refrigerant pressure to enable heat rejection
outside.
,4. A thermostat controls:
A. Airflow speed
B. Refrigerant flow
C. System temperature
D. Duct pressure
Rationale: Thermostats sense temperature and control system operation.
5. The purpose of the condenser coil is to:
A. Evaporate refrigerant
B. Reject heat to the outdoors
C. Increase airflow
D. Absorb heat from indoor air
Rationale: The condenser releases heat absorbed indoors to the outside
environment.
6. Which refrigerant has zero ozone depletion potential?
A. R-22
B. R-12
C. R-410A
D. R-502
Rationale: R-410A does not deplete ozone and is used in modern systems.
7. Superheat refers to:
A. Liquid refrigerant temperature
B. Vapor temperature above its boiling point
C. Condensing temperature
D. Subcooling temperature
Rationale: Superheat is measured after complete vaporization.
8. Subcooling is:
A. Vapor above boiling point
B. Liquid below condensing temperature
C. Compressor discharge temperature
D. Indoor temperature
Rationale: Subcooling ensures liquid refrigerant enters the expansion
device.
, 9. What tool measures refrigerant pressure?
A. Multimeter
B. Thermometer
C. Manifold Gauge Set
D. Anemometer
Rationale: Manifold gauges read high and low side pressures.
10.In electrical circuits, voltage is measured in:
A. Ohms
B. Amps
C. Volts
D. Watts
Rationale: Voltage is the electrical potential difference.
11.What does SEER stand for?
A. Standard Energy Efficiency Rating
B. Seasonal Energy Evaluation Ratio
C. Seasonal Energy Efficiency Ratio
D. Specific Energy Efficiency Requirement
Rationale: SEER indicates cooling efficiency over a season.
12.A heat pump can:
A. Only cool air
B. Heat and cool
C. Only heat
D. Only filter air
Rationale: Heat pumps reverse refrigerant flow to heat or cool.
13.A TXV stands for:
A. Thermal Exchange Valve
B. Time X Valve
C. Thermostatic Expansion Valve
D. Temperature X Vent
Rationale: TXV meters refrigerant to the evaporator based on load.
14.What does BTU stand for?
A. British Temperature Unit
B. Basic Thermal Unit
TECHNICIAN HVAC CERTIFICATION
PRACTICE EXAM QUESTION AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. What does HVAC stand for?
A. Heating, Ventilation, and Air Conditioning
B. Heat, Vacuum, and A/C
C. High Velocity Air Circulation
D. Home Ventilation and Airflow
Rationale: HVAC refers to the systems that control indoor environmental
comfort by heating, ventilating, and air conditioning.
2. Which component removes heat from indoor air?
A. Compressor
B. Evaporator Coil
C. Condenser Coil
D. Expansion Valve
Rationale: The evaporator coil absorbs heat from indoor air to cool it.
3. The function of a compressor in an HVAC system is to:
A. Remove humidity
B. Cool the air
C. Increase refrigerant pressure
D. Filter the air
Rationale: Compressors raise refrigerant pressure to enable heat rejection
outside.
,4. A thermostat controls:
A. Airflow speed
B. Refrigerant flow
C. System temperature
D. Duct pressure
Rationale: Thermostats sense temperature and control system operation.
5. The purpose of the condenser coil is to:
A. Evaporate refrigerant
B. Reject heat to the outdoors
C. Increase airflow
D. Absorb heat from indoor air
Rationale: The condenser releases heat absorbed indoors to the outside
environment.
6. Which refrigerant has zero ozone depletion potential?
A. R-22
B. R-12
C. R-410A
D. R-502
Rationale: R-410A does not deplete ozone and is used in modern systems.
7. Superheat refers to:
A. Liquid refrigerant temperature
B. Vapor temperature above its boiling point
C. Condensing temperature
D. Subcooling temperature
Rationale: Superheat is measured after complete vaporization.
8. Subcooling is:
A. Vapor above boiling point
B. Liquid below condensing temperature
C. Compressor discharge temperature
D. Indoor temperature
Rationale: Subcooling ensures liquid refrigerant enters the expansion
device.
, 9. What tool measures refrigerant pressure?
A. Multimeter
B. Thermometer
C. Manifold Gauge Set
D. Anemometer
Rationale: Manifold gauges read high and low side pressures.
10.In electrical circuits, voltage is measured in:
A. Ohms
B. Amps
C. Volts
D. Watts
Rationale: Voltage is the electrical potential difference.
11.What does SEER stand for?
A. Standard Energy Efficiency Rating
B. Seasonal Energy Evaluation Ratio
C. Seasonal Energy Efficiency Ratio
D. Specific Energy Efficiency Requirement
Rationale: SEER indicates cooling efficiency over a season.
12.A heat pump can:
A. Only cool air
B. Heat and cool
C. Only heat
D. Only filter air
Rationale: Heat pumps reverse refrigerant flow to heat or cool.
13.A TXV stands for:
A. Thermal Exchange Valve
B. Time X Valve
C. Thermostatic Expansion Valve
D. Temperature X Vent
Rationale: TXV meters refrigerant to the evaporator based on load.
14.What does BTU stand for?
A. British Temperature Unit
B. Basic Thermal Unit
