Georgia Conditioned Air (HVAC)
Contractor Licensing Examination
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. Which refrigerant has zero ozone depletion potential
(ODP)?
A. R-22
B. R-12
C. R-410A
D. R-11
Answer: C. R-410A
R-410A contains no chlorine and therefore has zero ozone
depletion potential, although it has a relatively high global
warming potential.
2. Superheat is defined as:
A. Temperature below saturation
B. Difference between condensing and evaporating
temperature
,C. Temperature of vapor above its saturation temperature
D. Temperature of liquid below saturation
Answer: C. Temperature of vapor above its saturation
temperature
Superheat ensures only vapor reaches the compressor,
preventing liquid slugging.
3. Subcooling refers to:
A. Cooling vapor below saturation
B. Heating liquid above saturation
C. Cooling liquid refrigerant below its saturation
temperature
D. Condensing refrigerant
Answer: C. Cooling liquid refrigerant below its saturation
temperature
Subcooling ensures solid liquid refrigerant reaches the
metering device.
4. Which instrument measures airflow?
A. Manifold gauge
B. Micron gauge
C. Anemometer
D. Psychrometer
Answer: C. Anemometer
,An anemometer measures air velocity and helps calculate
airflow.
5. A micron gauge measures:
A. Airflow
B. Pressure above atmosphere
C. Refrigerant charge
D. Vacuum level
Answer: D. Vacuum level
A micron gauge accurately measures deep vacuum during
evacuation.
6. The primary purpose of evacuation is to remove:
A. Refrigerant only
B. Oil only
C. Air and moisture
D. Nitrogen
Answer: C. Air and moisture
Removing moisture prevents acid formation and system
damage.
7. What device protects compressors from high pressure?
A. Transformer
B. Thermostat
, C. High-pressure switch
D. Capacitor
Answer: C. High-pressure switch
High-pressure switches shut down equipment before
dangerous pressures occur.
8. The evaporator coil absorbs:
A. Electrical energy
B. Refrigerant
C. Heat from indoor air
D. Condenser water
Answer: C. Heat from indoor air
The evaporator transfers indoor heat into the refrigerant.
9. Which refrigerant line should be insulated?
A. Liquid line
B. Drain line
C. Suction line
D. Vent line
Answer: C. Suction line
Insulating the suction line prevents heat gain and
condensation.
10. The compressor's primary function is to:
Contractor Licensing Examination
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. Which refrigerant has zero ozone depletion potential
(ODP)?
A. R-22
B. R-12
C. R-410A
D. R-11
Answer: C. R-410A
R-410A contains no chlorine and therefore has zero ozone
depletion potential, although it has a relatively high global
warming potential.
2. Superheat is defined as:
A. Temperature below saturation
B. Difference between condensing and evaporating
temperature
,C. Temperature of vapor above its saturation temperature
D. Temperature of liquid below saturation
Answer: C. Temperature of vapor above its saturation
temperature
Superheat ensures only vapor reaches the compressor,
preventing liquid slugging.
3. Subcooling refers to:
A. Cooling vapor below saturation
B. Heating liquid above saturation
C. Cooling liquid refrigerant below its saturation
temperature
D. Condensing refrigerant
Answer: C. Cooling liquid refrigerant below its saturation
temperature
Subcooling ensures solid liquid refrigerant reaches the
metering device.
4. Which instrument measures airflow?
A. Manifold gauge
B. Micron gauge
C. Anemometer
D. Psychrometer
Answer: C. Anemometer
,An anemometer measures air velocity and helps calculate
airflow.
5. A micron gauge measures:
A. Airflow
B. Pressure above atmosphere
C. Refrigerant charge
D. Vacuum level
Answer: D. Vacuum level
A micron gauge accurately measures deep vacuum during
evacuation.
6. The primary purpose of evacuation is to remove:
A. Refrigerant only
B. Oil only
C. Air and moisture
D. Nitrogen
Answer: C. Air and moisture
Removing moisture prevents acid formation and system
damage.
7. What device protects compressors from high pressure?
A. Transformer
B. Thermostat
, C. High-pressure switch
D. Capacitor
Answer: C. High-pressure switch
High-pressure switches shut down equipment before
dangerous pressures occur.
8. The evaporator coil absorbs:
A. Electrical energy
B. Refrigerant
C. Heat from indoor air
D. Condenser water
Answer: C. Heat from indoor air
The evaporator transfers indoor heat into the refrigerant.
9. Which refrigerant line should be insulated?
A. Liquid line
B. Drain line
C. Suction line
D. Vent line
Answer: C. Suction line
Insulating the suction line prevents heat gain and
condensation.
10. The compressor's primary function is to:
