Georgia Conditioned Air Contractor
Class I Examination Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
Q1. Which refrigerant property primarily determines its ability to absorb heat at
low temperatures?
A. Latent heat of vaporization
B. Specific gravity
C. Electrical conductivity
D. Viscosity
Correct Answer: A
Rationale: Latent heat of vaporization is the amount of heat a refrigerant
absorbs during phase change from liquid to vapor without a temperature
change. This property is fundamental to refrigeration because cooling occurs
through evaporation in the evaporator coil. Higher latent heat allows more heat
absorption per pound of refrigerant, improving system efficiency and capacity.
Other options do not directly contribute to heat absorption performance in HVAC
cycles.
Q2. What is the correct EPA requirement for refrigerant recovery before disposal
of a system?
A. No recovery required for small systems
B. Refrigerant must be vented
,C. Refrigerant must be recovered using certified equipment
D. Only oil must be removed
Correct Answer: B
Rationale: EPA regulations strictly prohibit intentional venting of refrigerants
into the atmosphere due to environmental harm, particularly ozone depletion
and global warming potential. Recovery using certified equipment is mandatory
before disposal or servicing. Technicians must follow Section 608 compliance
rules. Venting is illegal except for specific exempt substances. Proper recovery
protects the environment and ensures legal compliance.
Q3. In a vapor-compression cycle, where does heat absorption occur?
A. Condenser
B. Compressor
C. Evaporator
D. Expansion valve
Correct Answer: C
Rationale: The evaporator is where refrigerant absorbs heat from indoor air,
causing it to evaporate from liquid to vapor. This phase change is the cooling
process. The condenser rejects heat, the compressor increases pressure, and the
expansion valve reduces pressure. Understanding component roles is essential
for diagnosing HVAC system performance issues.
Q4. What is the function of the compressor in an HVAC system?
A. Reduce refrigerant temperature
B. Increase refrigerant pressure and temperature
C. Convert vapor to liquid
D. Meter refrigerant flow
Correct Answer: D
,Rationale: Compressor functions are critical in system operation. It draws low-
pressure vapor from the evaporator and compresses it into a high-pressure,
high-temperature vapor for heat rejection in the condenser. This pressure
differential drives refrigerant flow. Without compression, the refrigeration cycle
cannot maintain continuous heat transfer.
Q5. Which correct answer defines superheat?
A. Temperature below saturation point
B. Heat added after liquid formation
C. Temperature of liquid refrigerant in condenser
D. Heat removed in compressor
Correct Answer: C
Rationale: Superheat is the temperature increase of refrigerant vapor above its
boiling (saturation) point after complete evaporation. It ensures no liquid enters
the compressor, preventing damage. Proper superheat measurement is essential
for system efficiency and compressor protection. It is measured at the
evaporator outlet or suction line.
Q6. What is the purpose of a thermostatic expansion valve (TXV)?
A. Compress refrigerant
B. Control refrigerant flow into evaporator
C. Increase condenser pressure
D. Store refrigerant
Correct Answer: A
Rationale: The TXV regulates refrigerant flow based on evaporator load and
superheat conditions. It ensures optimal evaporator performance by
maintaining proper refrigerant feed. This prevents flooding or starvation of the
coil. Accurate metering improves efficiency and system stability under varying
load conditions.
, Q7. Which tool is used to measure electrical resistance in HVAC diagnostics?
A. Manometer
B. Clamp meter
C. Ohmmeter
D. Thermometer
Correct Answer: B
Rationale: An ohmmeter measures electrical resistance in circuits and
components such as motors, windings, and sensors. It helps diagnose open
circuits, shorts, and component failures. Proper resistance testing ensures
electrical integrity and safe system operation.
Q8. What is the primary purpose of a condenser coil?
A. Absorb indoor heat
B. Reject heat to outdoor air
C. Compress refrigerant
D. Regulate airflow
Correct Answer: C
Rationale: The condenser coil releases heat absorbed from indoor air into the
outdoor environment. High-pressure refrigerant vapor condenses into liquid
during this process. Proper airflow across the coil is essential for efficient heat
rejection and system performance.
Q9. Which law governs pressure, volume, and temperature relationships in HVAC
systems?
A. Newton’s Law
B. Boyle’s Law
C. Ohm’s Law
D. Dalton’s Law
Class I Examination Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
Q1. Which refrigerant property primarily determines its ability to absorb heat at
low temperatures?
A. Latent heat of vaporization
B. Specific gravity
C. Electrical conductivity
D. Viscosity
Correct Answer: A
Rationale: Latent heat of vaporization is the amount of heat a refrigerant
absorbs during phase change from liquid to vapor without a temperature
change. This property is fundamental to refrigeration because cooling occurs
through evaporation in the evaporator coil. Higher latent heat allows more heat
absorption per pound of refrigerant, improving system efficiency and capacity.
Other options do not directly contribute to heat absorption performance in HVAC
cycles.
Q2. What is the correct EPA requirement for refrigerant recovery before disposal
of a system?
A. No recovery required for small systems
B. Refrigerant must be vented
,C. Refrigerant must be recovered using certified equipment
D. Only oil must be removed
Correct Answer: B
Rationale: EPA regulations strictly prohibit intentional venting of refrigerants
into the atmosphere due to environmental harm, particularly ozone depletion
and global warming potential. Recovery using certified equipment is mandatory
before disposal or servicing. Technicians must follow Section 608 compliance
rules. Venting is illegal except for specific exempt substances. Proper recovery
protects the environment and ensures legal compliance.
Q3. In a vapor-compression cycle, where does heat absorption occur?
A. Condenser
B. Compressor
C. Evaporator
D. Expansion valve
Correct Answer: C
Rationale: The evaporator is where refrigerant absorbs heat from indoor air,
causing it to evaporate from liquid to vapor. This phase change is the cooling
process. The condenser rejects heat, the compressor increases pressure, and the
expansion valve reduces pressure. Understanding component roles is essential
for diagnosing HVAC system performance issues.
Q4. What is the function of the compressor in an HVAC system?
A. Reduce refrigerant temperature
B. Increase refrigerant pressure and temperature
C. Convert vapor to liquid
D. Meter refrigerant flow
Correct Answer: D
,Rationale: Compressor functions are critical in system operation. It draws low-
pressure vapor from the evaporator and compresses it into a high-pressure,
high-temperature vapor for heat rejection in the condenser. This pressure
differential drives refrigerant flow. Without compression, the refrigeration cycle
cannot maintain continuous heat transfer.
Q5. Which correct answer defines superheat?
A. Temperature below saturation point
B. Heat added after liquid formation
C. Temperature of liquid refrigerant in condenser
D. Heat removed in compressor
Correct Answer: C
Rationale: Superheat is the temperature increase of refrigerant vapor above its
boiling (saturation) point after complete evaporation. It ensures no liquid enters
the compressor, preventing damage. Proper superheat measurement is essential
for system efficiency and compressor protection. It is measured at the
evaporator outlet or suction line.
Q6. What is the purpose of a thermostatic expansion valve (TXV)?
A. Compress refrigerant
B. Control refrigerant flow into evaporator
C. Increase condenser pressure
D. Store refrigerant
Correct Answer: A
Rationale: The TXV regulates refrigerant flow based on evaporator load and
superheat conditions. It ensures optimal evaporator performance by
maintaining proper refrigerant feed. This prevents flooding or starvation of the
coil. Accurate metering improves efficiency and system stability under varying
load conditions.
, Q7. Which tool is used to measure electrical resistance in HVAC diagnostics?
A. Manometer
B. Clamp meter
C. Ohmmeter
D. Thermometer
Correct Answer: B
Rationale: An ohmmeter measures electrical resistance in circuits and
components such as motors, windings, and sensors. It helps diagnose open
circuits, shorts, and component failures. Proper resistance testing ensures
electrical integrity and safe system operation.
Q8. What is the primary purpose of a condenser coil?
A. Absorb indoor heat
B. Reject heat to outdoor air
C. Compress refrigerant
D. Regulate airflow
Correct Answer: C
Rationale: The condenser coil releases heat absorbed from indoor air into the
outdoor environment. High-pressure refrigerant vapor condenses into liquid
during this process. Proper airflow across the coil is essential for efficient heat
rejection and system performance.
Q9. Which law governs pressure, volume, and temperature relationships in HVAC
systems?
A. Newton’s Law
B. Boyle’s Law
C. Ohm’s Law
D. Dalton’s Law
