HVAC Apprentice Technician Practice
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What does HVAC stand for?
A. Heating, Ventilation, Air Conditioning
B. Heat Vacuum Air Control
C. Home Vent Air Cooling
D. Heat Valve Air Compressor
Answer: B
Rationale: HVAC stands for Heating, Ventilation, and Air
Conditioning.
2. The primary function of an air filter is to:
A. Increase airflow
B. Remove contaminants from air
C. Cool refrigerant
D. Heat incoming air
Answer: B
Rationale: Air filters trap dust and particles to improve air quality.
3. Refrigerant changes from liquid to gas in the:
A. Compressor
, B. Condenser
C. Evaporator
D. Expansion valve
Answer: C
Rationale: The evaporator allows refrigerant to absorb heat and
evaporate.
4. What tool measures electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Thermometer
Answer: B
Rationale: An ammeter measures current in amperes.
5. The compressor’s main job is to:
A. Cool air
B. Pump refrigerant
C. Filter air
D. Expand gas
Answer: B
Rationale: The compressor circulates refrigerant through the
system.
6. What is the boiling point of water in Fahrenheit?
A. 212°F
, B. 100°F
C. 32°F
D. 180°F
Answer: A
Rationale: Water boils at 212°F at standard atmospheric pressure.
7. Which component removes heat from refrigerant?
A. Compressor
B. Condenser
C. Evaporator
D. Fan motor
Answer: B
Rationale: The condenser releases heat to the outside air.
8. A thermostat controls:
A. Refrigerant flow
B. Temperature
C. Voltage
D. Air filters
Answer: B
Rationale: Thermostats regulate system temperature.
9. What gas is commonly used in HVAC systems?
A. Oxygen
B. Refrigerant
C. Nitrogen
, D. Hydrogen
Answer: B
Rationale: Refrigerant absorbs and releases heat.
10. Low refrigerant charge typically causes:
A. Overcooling
B. Poor cooling
C. High voltage
D. Faster airflow
Answer: B
Rationale: Low refrigerant reduces cooling efficiency.
11. Which unit measures resistance?
A. Ampere
B. Volt
C. Ohm
D. Watt
Answer: C
Rationale: Resistance is measured in ohms.
12. The evaporator coil is located in the:
A. Outdoor unit
B. Indoor unit
C. Compressor
D. Expansion tank
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What does HVAC stand for?
A. Heating, Ventilation, Air Conditioning
B. Heat Vacuum Air Control
C. Home Vent Air Cooling
D. Heat Valve Air Compressor
Answer: B
Rationale: HVAC stands for Heating, Ventilation, and Air
Conditioning.
2. The primary function of an air filter is to:
A. Increase airflow
B. Remove contaminants from air
C. Cool refrigerant
D. Heat incoming air
Answer: B
Rationale: Air filters trap dust and particles to improve air quality.
3. Refrigerant changes from liquid to gas in the:
A. Compressor
, B. Condenser
C. Evaporator
D. Expansion valve
Answer: C
Rationale: The evaporator allows refrigerant to absorb heat and
evaporate.
4. What tool measures electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Thermometer
Answer: B
Rationale: An ammeter measures current in amperes.
5. The compressor’s main job is to:
A. Cool air
B. Pump refrigerant
C. Filter air
D. Expand gas
Answer: B
Rationale: The compressor circulates refrigerant through the
system.
6. What is the boiling point of water in Fahrenheit?
A. 212°F
, B. 100°F
C. 32°F
D. 180°F
Answer: A
Rationale: Water boils at 212°F at standard atmospheric pressure.
7. Which component removes heat from refrigerant?
A. Compressor
B. Condenser
C. Evaporator
D. Fan motor
Answer: B
Rationale: The condenser releases heat to the outside air.
8. A thermostat controls:
A. Refrigerant flow
B. Temperature
C. Voltage
D. Air filters
Answer: B
Rationale: Thermostats regulate system temperature.
9. What gas is commonly used in HVAC systems?
A. Oxygen
B. Refrigerant
C. Nitrogen
, D. Hydrogen
Answer: B
Rationale: Refrigerant absorbs and releases heat.
10. Low refrigerant charge typically causes:
A. Overcooling
B. Poor cooling
C. High voltage
D. Faster airflow
Answer: B
Rationale: Low refrigerant reduces cooling efficiency.
11. Which unit measures resistance?
A. Ampere
B. Volt
C. Ohm
D. Watt
Answer: C
Rationale: Resistance is measured in ohms.
12. The evaporator coil is located in the:
A. Outdoor unit
B. Indoor unit
C. Compressor
D. Expansion tank
