Georgia Conditioned Air Contractor
Class I Examination Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
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1. Which of the following is the most important reason for proper refrigerant
charging in an HVAC system?
A. To reduce noise
B. To prevent corrosion
C. To ensure system efficiency and prevent damage
D. To improve air quality
Rationale: Proper refrigerant levels maintain efficiency, prevent compressor
damage, and ensure the system operates safely.
2. What type of heat exchanger is commonly used in residential air
conditioning systems?
A. Plate
B. Coil (fin-tube)
C. Shell and tube
D. Spiral
Rationale: Coil heat exchangers efficiently transfer heat between
refrigerant and air in residential systems.
3. What is the primary function of a compressor in a refrigeration cycle?
,A. Evaporate refrigerant
B. Absorb heat
C. Increase refrigerant pressure and temperature
D. Filter air
Rationale: The compressor raises refrigerant pressure and temperature so it
can release heat in the condenser.
4. Which of the following is a sign of a dirty air filter?
A. Reduced humidity
B. Increased compressor speed
C. Reduced airflow and higher energy consumption
D. Noise from the condenser
Rationale: Dirty filters restrict airflow, causing the system to work harder
and use more energy.
5. Which refrigerant has the lowest ozone depletion potential?
A. R-22
B. R-11
C. R-410A
D. R-12
Rationale: R-410A does not contain chlorine and has zero ozone depletion
potential, making it environmentally safer.
6. What is the purpose of a metering device in a refrigeration system?
A. Heat refrigerant
B. Control refrigerant flow into the evaporator
C. Compress refrigerant
D. Filter moisture
Rationale: The metering device regulates the amount of refrigerant
entering the evaporator to ensure proper cooling.
, 7. Which type of duct material is most common in residential HVAC
installations?
A. Aluminum
B. PVC
C. Galvanized steel
D. Copper
Rationale: Galvanized steel ducts are durable, easy to fabricate, and widely
used in residential HVAC systems.
8. What is the typical maximum temperature rise across a supply air
register? A. 10–15°F
B. 20–25°F
C. 30–40°F
D. 50–60°F
Rationale: A 30–40°F temperature rise is common in residential forced-air
systems to maintain comfort and efficiency.
9. What is the primary function of a condenser in an air conditioning system?
A. Evaporate refrigerant
B. Release heat from the refrigerant to the outside air
C. Increase airflow
D. Control humidity
Rationale: The condenser removes heat from the refrigerant, allowing it to
condense back into liquid form.
10. Which of the following is considered a common sign of refrigerant
leakage?
A. Rust on the evaporator coil
B. Frost on suction line and reduced cooling
C. Increased airflow
D. Noise from the blower motor
Class I Examination Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. Which of the following is the most important reason for proper refrigerant
charging in an HVAC system?
A. To reduce noise
B. To prevent corrosion
C. To ensure system efficiency and prevent damage
D. To improve air quality
Rationale: Proper refrigerant levels maintain efficiency, prevent compressor
damage, and ensure the system operates safely.
2. What type of heat exchanger is commonly used in residential air
conditioning systems?
A. Plate
B. Coil (fin-tube)
C. Shell and tube
D. Spiral
Rationale: Coil heat exchangers efficiently transfer heat between
refrigerant and air in residential systems.
3. What is the primary function of a compressor in a refrigeration cycle?
,A. Evaporate refrigerant
B. Absorb heat
C. Increase refrigerant pressure and temperature
D. Filter air
Rationale: The compressor raises refrigerant pressure and temperature so it
can release heat in the condenser.
4. Which of the following is a sign of a dirty air filter?
A. Reduced humidity
B. Increased compressor speed
C. Reduced airflow and higher energy consumption
D. Noise from the condenser
Rationale: Dirty filters restrict airflow, causing the system to work harder
and use more energy.
5. Which refrigerant has the lowest ozone depletion potential?
A. R-22
B. R-11
C. R-410A
D. R-12
Rationale: R-410A does not contain chlorine and has zero ozone depletion
potential, making it environmentally safer.
6. What is the purpose of a metering device in a refrigeration system?
A. Heat refrigerant
B. Control refrigerant flow into the evaporator
C. Compress refrigerant
D. Filter moisture
Rationale: The metering device regulates the amount of refrigerant
entering the evaporator to ensure proper cooling.
, 7. Which type of duct material is most common in residential HVAC
installations?
A. Aluminum
B. PVC
C. Galvanized steel
D. Copper
Rationale: Galvanized steel ducts are durable, easy to fabricate, and widely
used in residential HVAC systems.
8. What is the typical maximum temperature rise across a supply air
register? A. 10–15°F
B. 20–25°F
C. 30–40°F
D. 50–60°F
Rationale: A 30–40°F temperature rise is common in residential forced-air
systems to maintain comfort and efficiency.
9. What is the primary function of a condenser in an air conditioning system?
A. Evaporate refrigerant
B. Release heat from the refrigerant to the outside air
C. Increase airflow
D. Control humidity
Rationale: The condenser removes heat from the refrigerant, allowing it to
condense back into liquid form.
10. Which of the following is considered a common sign of refrigerant
leakage?
A. Rust on the evaporator coil
B. Frost on suction line and reduced cooling
C. Increased airflow
D. Noise from the blower motor
