INDIANA HVAC CONTRACTOR EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary function of an HVAC system?
A. Generate electricity
B. Control indoor temperature, humidity, and air quality
C. Produce refrigeration gas
D. Increase outdoor ventilation
Rationale: HVAC systems are designed to provide thermal
comfort and acceptable indoor air quality through heating,
ventilation, and cooling.
Correct Answer: B
2. Which refrigerant property allows heat absorption in the
evaporator?
A. High pressure
B. Low boiling point
C. High viscosity
D. High density
Rationale: Refrigerants absorb heat when they evaporate at
low boiling points inside the evaporator coil.
Correct Answer: B
,3. What component removes moisture from refrigerant in a
system?
A. Compressor
B. Expansion valve
C. Filter drier
D. Condenser
Rationale: A filter drier removes moisture and contaminants to
protect the system.
Correct Answer: C
4. What is the function of the compressor in a refrigeration
cycle?
A. Cool air
B. Increase refrigerant pressure and temperature
C. Store refrigerant
D. Measure airflow
Rationale: The compressor pressurizes refrigerant gas, raising
its temperature for heat rejection.
Correct Answer: B
5. Which law relates pressure, volume, and temperature of
gases?
,A. Ohm’s Law
B. Boyle’s Law
C. Newton’s Law
D. Pascal’s Law
Rationale: Boyle’s Law describes inverse relationship between
pressure and volume at constant temperature.
Correct Answer: B
6. What does CFM measure in HVAC systems?
A. Cooling fluid mass
B. Compressor force
C. Airflow rate
D. Fuel mixture
Rationale: CFM (cubic feet per minute) measures airflow
volume in ventilation systems.
Correct Answer: C
7. What is the purpose of a thermostat?
A. Control refrigerant flow
B. Measure humidity only
C. Regulate temperature by switching HVAC system on/off
D. Increase compressor speed
, Rationale: A thermostat maintains set temperature by
controlling system operation.
Correct Answer: C
8. Which HVAC component rejects heat outdoors?
A. Evaporator
B. Expansion valve
C. Condenser
D. Blower motor
Rationale: The condenser releases absorbed heat to the
outside air.
Correct Answer: C
9. What is superheat in HVAC systems?
A. Refrigerant below freezing
B. Temperature increase above boiling point after evaporation
C. Condenser pressure drop
D. Liquid refrigerant cooling
Rationale: Superheat ensures all liquid refrigerant has
evaporated before reaching compressor.
Correct Answer: B
10. Which electrical unit measures resistance?
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary function of an HVAC system?
A. Generate electricity
B. Control indoor temperature, humidity, and air quality
C. Produce refrigeration gas
D. Increase outdoor ventilation
Rationale: HVAC systems are designed to provide thermal
comfort and acceptable indoor air quality through heating,
ventilation, and cooling.
Correct Answer: B
2. Which refrigerant property allows heat absorption in the
evaporator?
A. High pressure
B. Low boiling point
C. High viscosity
D. High density
Rationale: Refrigerants absorb heat when they evaporate at
low boiling points inside the evaporator coil.
Correct Answer: B
,3. What component removes moisture from refrigerant in a
system?
A. Compressor
B. Expansion valve
C. Filter drier
D. Condenser
Rationale: A filter drier removes moisture and contaminants to
protect the system.
Correct Answer: C
4. What is the function of the compressor in a refrigeration
cycle?
A. Cool air
B. Increase refrigerant pressure and temperature
C. Store refrigerant
D. Measure airflow
Rationale: The compressor pressurizes refrigerant gas, raising
its temperature for heat rejection.
Correct Answer: B
5. Which law relates pressure, volume, and temperature of
gases?
,A. Ohm’s Law
B. Boyle’s Law
C. Newton’s Law
D. Pascal’s Law
Rationale: Boyle’s Law describes inverse relationship between
pressure and volume at constant temperature.
Correct Answer: B
6. What does CFM measure in HVAC systems?
A. Cooling fluid mass
B. Compressor force
C. Airflow rate
D. Fuel mixture
Rationale: CFM (cubic feet per minute) measures airflow
volume in ventilation systems.
Correct Answer: C
7. What is the purpose of a thermostat?
A. Control refrigerant flow
B. Measure humidity only
C. Regulate temperature by switching HVAC system on/off
D. Increase compressor speed
, Rationale: A thermostat maintains set temperature by
controlling system operation.
Correct Answer: C
8. Which HVAC component rejects heat outdoors?
A. Evaporator
B. Expansion valve
C. Condenser
D. Blower motor
Rationale: The condenser releases absorbed heat to the
outside air.
Correct Answer: C
9. What is superheat in HVAC systems?
A. Refrigerant below freezing
B. Temperature increase above boiling point after evaporation
C. Condenser pressure drop
D. Liquid refrigerant cooling
Rationale: Superheat ensures all liquid refrigerant has
evaporated before reaching compressor.
Correct Answer: B
10. Which electrical unit measures resistance?
