Colorado HVAC Contractor Licensing Exam – Practice Questions with Correct Answers

COLORADO HVAC CONTRACTOR LICENSING EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 | INSTANT DOWNLOAD PDF
1. What is the primary purpose of an HVAC system?
A. To generate electricity
B. To control indoor temperature, humidity, and air quality
C. To supply water to buildings
D. To provide structural support
Rationale: HVAC systems regulate indoor environmental
comfort and air quality.
Correct Answer: B


2. Which refrigerant property is most important for efficient
heat transfer?
A. High viscosity
B. Low boiling point
C. High electrical conductivity
D. High density
Rationale: Refrigerants must evaporate and condense easily to
transfer heat efficiently.
Correct Answer: B

,3. What component removes moisture from the air in an
HVAC system?
A. Compressor
B. Evaporator coil
C. Thermostat
D. Blower motor
Rationale: The evaporator coil cools air below dew point,
causing condensation.
Correct Answer: B


4. Which gas is most commonly used in modern HVAC
refrigeration cycles?
A. Oxygen
B. Carbon dioxide
C. Refrigerant R-410A
D. Nitrogen
Rationale: R-410A is widely used in modern systems due to
efficiency and environmental compliance.
Correct Answer: C


5. What is the function of a compressor in an HVAC system?
A. Expands refrigerant
B. Filters air

,C. Increases refrigerant pressure and temperature
D. Removes humidity
Rationale: The compressor circulates refrigerant and raises its
pressure.
Correct Answer: C


6. Which law explains the relationship between pressure and
temperature in a sealed gas system?
A. Ohm’s Law
B. Boyle’s Law
C. Newton’s Law
D. Faraday’s Law
Rationale: Boyle’s Law relates pressure and volume in gases.
Correct Answer: B


7. What does SEER rating measure in HVAC systems?
A. Sound efficiency
B. Seasonal energy efficiency ratio
C. System emission energy rate
D. Static electrical efficiency rating
Rationale: SEER measures cooling efficiency over a season.
Correct Answer: B

, 8. What is the purpose of a thermostat?
A. Increase refrigerant pressure
B. Control system temperature setpoints
C. Filter air contaminants
D. Drain condensate water
Rationale: Thermostats regulate HVAC operation based on
temperature.
Correct Answer: B


9. Which HVAC component changes refrigerant from liquid to
gas?
A. Condenser
B. Expansion valve
C. Evaporator
D. Compressor
Rationale: The evaporator absorbs heat and vaporizes
refrigerant.
Correct Answer: C


10. What is the main function of the condenser coil?
A. Absorb heat from indoor air
B. Release heat to outside air
C. Compress refrigerant
D. Measure airflow