Kansas Refrigeration Contractor Exam
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which refrigerant property allows it to absorb heat during
evaporation?
A. Density
B. Latent heat
C. Viscosity
D. Conductivity
Answer: B
Rationale: Latent heat is the amount of heat absorbed when a
refrigerant changes from liquid to vapor without a temperature
change, which is the basis of refrigeration.
2. Which component meters refrigerant flow into the evaporator?
A. Compressor
B. Condenser
C. Expansion device
D. Receiver
Answer: C
Rationale: The expansion device controls refrigerant flow and creates
a pressure drop necessary for evaporation.
3. What is the primary function of a compressor in a refrigeration
system?
A. Remove moisture
B. Absorb heat
C. Increase refrigerant pressure
D. Store refrigerant
Answer: C
, Rationale: The compressor raises refrigerant pressure and
temperature to allow heat rejection in the condenser.
4. Which refrigerant classification indicates low toxicity and no flame
propagation?
A. A1
B. A2
C. B1
D. B2
Answer: A
Rationale: A1 refrigerants have low toxicity and are non-flammable,
making them widely accepted for safety.
5. Superheating occurs in which component?
A. Condenser
B. Evaporator outlet
C. Receiver
D. Liquid line
Answer: B
Rationale: Superheat occurs when vapor refrigerant continues
absorbing heat after all liquid has evaporated.
6. What is the purpose of subcooling?
A. Increase suction pressure
B. Prevent flash gas
C. Reduce compressor size
D. Increase evaporation rate
Answer: B
Rationale: Subcooling ensures liquid refrigerant reaches the
expansion device without flashing into vapor.
7. Which tool is used to detect refrigerant leaks?
A. Psychrometer
B. Manometer
C. Electronic leak detector
D. Micrometer
Answer: C
Rationale: Electronic leak detectors sense refrigerant molecules
escaping from the system.
, 8. What is the function of a liquid receiver?
A. Store excess refrigerant
B. Remove heat
C. Reduce pressure
D. Compress vapor
Answer: A
Rationale: A receiver stores liquid refrigerant during low load or
pump-down conditions.
9. Which system uses one evaporator and one compressor?
A. Cascade system
B. Single-stage system
C. Compound system
D. Multistage system
Answer: B
Rationale: A single-stage system is the most basic refrigeration
configuration.
10. Oil migration problems are most likely caused by:
A. High superheat
B. Incorrect piping
C. Oversized condenser
D. Low ambient temperature
Answer: B
Rationale: Improper piping design can prevent oil from returning to
the compressor.
11. What safety device protects against excessive discharge
pressure?
A. Thermostat
B. High-pressure cutout
C. Solenoid valve
D. Sight glass
Answer: B
Rationale: High-pressure cutouts shut down the system to prevent
damage from excessive pressure.
12. Which gas is commonly used for pressure testing refrigeration
systems?
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which refrigerant property allows it to absorb heat during
evaporation?
A. Density
B. Latent heat
C. Viscosity
D. Conductivity
Answer: B
Rationale: Latent heat is the amount of heat absorbed when a
refrigerant changes from liquid to vapor without a temperature
change, which is the basis of refrigeration.
2. Which component meters refrigerant flow into the evaporator?
A. Compressor
B. Condenser
C. Expansion device
D. Receiver
Answer: C
Rationale: The expansion device controls refrigerant flow and creates
a pressure drop necessary for evaporation.
3. What is the primary function of a compressor in a refrigeration
system?
A. Remove moisture
B. Absorb heat
C. Increase refrigerant pressure
D. Store refrigerant
Answer: C
, Rationale: The compressor raises refrigerant pressure and
temperature to allow heat rejection in the condenser.
4. Which refrigerant classification indicates low toxicity and no flame
propagation?
A. A1
B. A2
C. B1
D. B2
Answer: A
Rationale: A1 refrigerants have low toxicity and are non-flammable,
making them widely accepted for safety.
5. Superheating occurs in which component?
A. Condenser
B. Evaporator outlet
C. Receiver
D. Liquid line
Answer: B
Rationale: Superheat occurs when vapor refrigerant continues
absorbing heat after all liquid has evaporated.
6. What is the purpose of subcooling?
A. Increase suction pressure
B. Prevent flash gas
C. Reduce compressor size
D. Increase evaporation rate
Answer: B
Rationale: Subcooling ensures liquid refrigerant reaches the
expansion device without flashing into vapor.
7. Which tool is used to detect refrigerant leaks?
A. Psychrometer
B. Manometer
C. Electronic leak detector
D. Micrometer
Answer: C
Rationale: Electronic leak detectors sense refrigerant molecules
escaping from the system.
, 8. What is the function of a liquid receiver?
A. Store excess refrigerant
B. Remove heat
C. Reduce pressure
D. Compress vapor
Answer: A
Rationale: A receiver stores liquid refrigerant during low load or
pump-down conditions.
9. Which system uses one evaporator and one compressor?
A. Cascade system
B. Single-stage system
C. Compound system
D. Multistage system
Answer: B
Rationale: A single-stage system is the most basic refrigeration
configuration.
10. Oil migration problems are most likely caused by:
A. High superheat
B. Incorrect piping
C. Oversized condenser
D. Low ambient temperature
Answer: B
Rationale: Improper piping design can prevent oil from returning to
the compressor.
11. What safety device protects against excessive discharge
pressure?
A. Thermostat
B. High-pressure cutout
C. Solenoid valve
D. Sight glass
Answer: B
Rationale: High-pressure cutouts shut down the system to prevent
damage from excessive pressure.
12. Which gas is commonly used for pressure testing refrigeration
systems?
