Georgia Conditioned Air Contractor (CN01/CN02)
Newest (2025 - 2026 Update) From Real Past
Papers Questions – Set 100 Most Common Exam
Frequently Tested Questions And Answers In
Details 100% Verified Exam Highly
Recommendable For Grade A+
This mock examination is an original revision resource based on the published
Georgia Conditioned Air Contractor examination scope, licensing requirements,
and commonly tested code topics. It is not copied from past examination
questions. It reflects the style and difficulty of the official examination, which
covers licensing law, business practices, HVAC theory, mechanical code, fuel gas
code, electrical fundamentals, load calculations, duct systems, installation, service,
and safety.
1. What is the primary purpose of performing a residential load calculation
before selecting HVAC equipment?
A. Reduce equipment cost
B. Determine thermostat location
C. Determine the required heating and cooling capacity
D. Select refrigerant type
Explanation: Proper load calculations ensure equipment is correctly sized for
comfort, efficiency, and humidity control.
, 2. Which refrigerant line carries low-pressure vapor from the evaporator to
the compressor?
A. Liquid line
B. Suction line
C. Discharge line
D. Receiver line
Explanation: The suction line transports cool, low-pressure refrigerant vapor back
to the compressor.
3. Excessively oversized air-conditioning equipment is most likely to cause:
A. Higher humidity removal
B. Short cycling and poor humidity control
C. Higher refrigerant pressure
D. Increased airflow
Explanation: Oversized systems satisfy the thermostat quickly but remove less
moisture.
4. Which component raises refrigerant vapor from low pressure to high
pressure?
A. Expansion valve
B. Evaporator
C. Compressor
D. Receiver
Explanation: The compressor is the heart of the refrigeration cycle.
, 5. The evaporator coil functions primarily to:
A. Reject heat outdoors
B. Absorb heat from indoor air
C. Compress refrigerant
D. Store refrigerant
Explanation: Indoor heat is absorbed as refrigerant evaporates.
6. Which instrument measures electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Manometer
Explanation: An ammeter measures current in amperes.
7. Airflow is commonly measured in:
A. PSI
B. Inches of mercury
C. Cubic feet per minute (CFM)
D. BTU/hr
Explanation: CFM measures the volume of air moving through a system.
8. Static pressure that is too high usually indicates:
, A. Low refrigerant charge
B. Airflow restriction
C. Compressor failure
D. Dirty condenser
Explanation: Restrictions such as dirty filters or undersized ducts increase static
pressure.
9. Which device meters refrigerant entering the evaporator?
A. Compressor
B. Accumulator
C. Thermostatic expansion valve
D. Condenser
Explanation: The TXV regulates refrigerant flow based on evaporator demand.
10.Superheat is measured as:
A. Liquid temperature below saturation
B. Vapor temperature above saturation
C. Condensing temperature
D. Ambient temperature
Explanation: Superheat indicates how much vapor temperature exceeds its
saturation temperature.
11.Which electrical law states that voltage equals current multiplied by
resistance?
Newest (2025 - 2026 Update) From Real Past
Papers Questions – Set 100 Most Common Exam
Frequently Tested Questions And Answers In
Details 100% Verified Exam Highly
Recommendable For Grade A+
This mock examination is an original revision resource based on the published
Georgia Conditioned Air Contractor examination scope, licensing requirements,
and commonly tested code topics. It is not copied from past examination
questions. It reflects the style and difficulty of the official examination, which
covers licensing law, business practices, HVAC theory, mechanical code, fuel gas
code, electrical fundamentals, load calculations, duct systems, installation, service,
and safety.
1. What is the primary purpose of performing a residential load calculation
before selecting HVAC equipment?
A. Reduce equipment cost
B. Determine thermostat location
C. Determine the required heating and cooling capacity
D. Select refrigerant type
Explanation: Proper load calculations ensure equipment is correctly sized for
comfort, efficiency, and humidity control.
, 2. Which refrigerant line carries low-pressure vapor from the evaporator to
the compressor?
A. Liquid line
B. Suction line
C. Discharge line
D. Receiver line
Explanation: The suction line transports cool, low-pressure refrigerant vapor back
to the compressor.
3. Excessively oversized air-conditioning equipment is most likely to cause:
A. Higher humidity removal
B. Short cycling and poor humidity control
C. Higher refrigerant pressure
D. Increased airflow
Explanation: Oversized systems satisfy the thermostat quickly but remove less
moisture.
4. Which component raises refrigerant vapor from low pressure to high
pressure?
A. Expansion valve
B. Evaporator
C. Compressor
D. Receiver
Explanation: The compressor is the heart of the refrigeration cycle.
, 5. The evaporator coil functions primarily to:
A. Reject heat outdoors
B. Absorb heat from indoor air
C. Compress refrigerant
D. Store refrigerant
Explanation: Indoor heat is absorbed as refrigerant evaporates.
6. Which instrument measures electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Manometer
Explanation: An ammeter measures current in amperes.
7. Airflow is commonly measured in:
A. PSI
B. Inches of mercury
C. Cubic feet per minute (CFM)
D. BTU/hr
Explanation: CFM measures the volume of air moving through a system.
8. Static pressure that is too high usually indicates:
, A. Low refrigerant charge
B. Airflow restriction
C. Compressor failure
D. Dirty condenser
Explanation: Restrictions such as dirty filters or undersized ducts increase static
pressure.
9. Which device meters refrigerant entering the evaporator?
A. Compressor
B. Accumulator
C. Thermostatic expansion valve
D. Condenser
Explanation: The TXV regulates refrigerant flow based on evaporator demand.
10.Superheat is measured as:
A. Liquid temperature below saturation
B. Vapor temperature above saturation
C. Condensing temperature
D. Ambient temperature
Explanation: Superheat indicates how much vapor temperature exceeds its
saturation temperature.
11.Which electrical law states that voltage equals current multiplied by
resistance?
