Georgia Conditioned Air Contractor
Class II Examination Practice Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A
Instant Download Pdf
1. What is the primary purpose of a refrigeration compressor in an air
conditioning system?
A. Remove moisture from indoor air
B. Move refrigerant through the system and raise its pressure
C. Increase airflow through ductwork
D. Control thermostat operation
Answer: Move refrigerant through the system and raise its pressure
Rationale: The compressor circulates refrigerant and increases refrigerant
pressure so heat can be rejected at the condenser.
2. Which refrigerant is commonly used in newer residential HVAC systems due to
environmental regulations replacing R-22?
A. R-12
B. R-22
,C. R-410A
D. R-11
Answer: R-410A
Rationale: R-410A became a common replacement for R-22 because it does not
contain ozone-depleting chlorine.
3. What component removes heat from refrigerant vapor and changes it into a
liquid?
A. Evaporator coil
B. Compressor
C. Condenser coil
D. Expansion valve
Answer: Condenser coil
Rationale: The condenser rejects heat and converts high-pressure refrigerant
vapor into liquid refrigerant.
4. What device controls the amount of refrigerant entering the evaporator?
A. Thermostat
B. Metering device
C. Blower motor
D. Filter
Answer: Metering device
Rationale: Expansion valves and other metering devices regulate refrigerant
flow into the evaporator.
5. A dirty air filter will most likely cause:
,A. Higher airflow
B. Reduced airflow
C. Increased refrigerant charge
D. Higher voltage
Answer: Reduced airflow
Rationale: Restricted filters reduce air movement and can cause poor system
performance or coil freezing.
6. What instrument measures refrigerant pressure?
A. Ammeter
B. Manometer
C. Manifold gauge set
D. Thermometer
Answer: Manifold gauge set
Rationale: HVAC technicians use manifold gauges to check suction and discharge
refrigerant pressures.
7. The evaporator coil absorbs:
A. Heat from indoor air
B. Electrical current
C. Outdoor humidity only
D. Refrigerant oil
Answer: Heat from indoor air
Rationale: The evaporator absorbs heat from conditioned air as refrigerant
changes state.
8. What is the purpose of a thermostat?
, A. Compress refrigerant
B. Sense and control temperature
C. Increase refrigerant pressure
D. Filter contaminants
Answer: Sense and control temperature
Rationale: Thermostats monitor temperature and signal HVAC equipment
operation.
9. The purpose of a condenser fan is to:
A. Move air across the condenser coil
B. Cool the evaporator coil
C. Increase refrigerant pressure
D. Heat the building
Answer: Move air across the condenser coil
Rationale: Condenser fans help remove heat from refrigerant at the outdoor
coil.
10. Superheat is measured to determine:
A. Refrigerant vapor temperature above boiling point
B. Air velocity only
C. Electrical resistance
D. Duct size
Answer: Refrigerant vapor temperature above boiling point
Rationale: Superheat indicates how much refrigerant vapor temperature
exceeds saturation temperature.
11. What does SEER measure?
Class II Examination Practice Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A
Instant Download Pdf
1. What is the primary purpose of a refrigeration compressor in an air
conditioning system?
A. Remove moisture from indoor air
B. Move refrigerant through the system and raise its pressure
C. Increase airflow through ductwork
D. Control thermostat operation
Answer: Move refrigerant through the system and raise its pressure
Rationale: The compressor circulates refrigerant and increases refrigerant
pressure so heat can be rejected at the condenser.
2. Which refrigerant is commonly used in newer residential HVAC systems due to
environmental regulations replacing R-22?
A. R-12
B. R-22
,C. R-410A
D. R-11
Answer: R-410A
Rationale: R-410A became a common replacement for R-22 because it does not
contain ozone-depleting chlorine.
3. What component removes heat from refrigerant vapor and changes it into a
liquid?
A. Evaporator coil
B. Compressor
C. Condenser coil
D. Expansion valve
Answer: Condenser coil
Rationale: The condenser rejects heat and converts high-pressure refrigerant
vapor into liquid refrigerant.
4. What device controls the amount of refrigerant entering the evaporator?
A. Thermostat
B. Metering device
C. Blower motor
D. Filter
Answer: Metering device
Rationale: Expansion valves and other metering devices regulate refrigerant
flow into the evaporator.
5. A dirty air filter will most likely cause:
,A. Higher airflow
B. Reduced airflow
C. Increased refrigerant charge
D. Higher voltage
Answer: Reduced airflow
Rationale: Restricted filters reduce air movement and can cause poor system
performance or coil freezing.
6. What instrument measures refrigerant pressure?
A. Ammeter
B. Manometer
C. Manifold gauge set
D. Thermometer
Answer: Manifold gauge set
Rationale: HVAC technicians use manifold gauges to check suction and discharge
refrigerant pressures.
7. The evaporator coil absorbs:
A. Heat from indoor air
B. Electrical current
C. Outdoor humidity only
D. Refrigerant oil
Answer: Heat from indoor air
Rationale: The evaporator absorbs heat from conditioned air as refrigerant
changes state.
8. What is the purpose of a thermostat?
, A. Compress refrigerant
B. Sense and control temperature
C. Increase refrigerant pressure
D. Filter contaminants
Answer: Sense and control temperature
Rationale: Thermostats monitor temperature and signal HVAC equipment
operation.
9. The purpose of a condenser fan is to:
A. Move air across the condenser coil
B. Cool the evaporator coil
C. Increase refrigerant pressure
D. Heat the building
Answer: Move air across the condenser coil
Rationale: Condenser fans help remove heat from refrigerant at the outdoor
coil.
10. Superheat is measured to determine:
A. Refrigerant vapor temperature above boiling point
B. Air velocity only
C. Electrical resistance
D. Duct size
Answer: Refrigerant vapor temperature above boiling point
Rationale: Superheat indicates how much refrigerant vapor temperature
exceeds saturation temperature.
11. What does SEER measure?
