Journeyman Refrigeration Technician
Examination Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
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1. What is the primary function of a refrigeration system?
A. Increase air pressure
B. Remove heat from a controlled space
C. Generate electrical power
D. Compress water vapor
Answer: B
Rationale: The primary purpose of refrigeration is to transfer
heat from a low-temperature area to a higher-temperature area,
thereby cooling the controlled space.
2. Which component is responsible for increasing refrigerant
pressure in a system?
A. Evaporator
B. Expansion valve
, C. Compressor
D. Condenser
Answer: C
Rationale: The compressor raises the pressure and temperature
of the refrigerant vapor so it can release heat in the condenser.
3. What state does refrigerant leave the evaporator in under normal
operation?
A. High-pressure liquid
B. Low-pressure vapor
C. High-pressure vapor
D. Subcooled liquid
Answer: B
Rationale: As refrigerant absorbs heat in the evaporator, it
typically exits as a low-pressure vapor.
4. What is the function of the expansion device?
A. Heat rejection
B. Pressure reduction and flow control
C. Compression of refrigerant
D. Moisture removal from air
, Answer: B
Rationale: The expansion device reduces refrigerant pressure
and meters flow into the evaporator.
5. Which refrigerant property determines its ability to absorb heat?
A. Toxicity
B. Latent heat of vaporization
C. Color
D. Electrical conductivity
Answer: B
Rationale: Latent heat of vaporization determines how much
heat a refrigerant can absorb during phase change.
6. What is superheat?
A. Liquid refrigerant below boiling point
B. Vapor above saturation temperature
C. Liquid above saturation pressure
D. Solid refrigerant state
Answer: B
Rationale: Superheat is the temperature of refrigerant vapor
above its saturation point at a given pressure.
, 7. What is subcooling?
A. Vapor cooling below dew point
B. Liquid cooled below saturation temperature
C. Gas compressed below ambient
D. Heat added to vapor
Answer: B
Rationale: Subcooling refers to cooling liquid refrigerant below
its saturation temperature without changing phase.
8. Which component removes heat from refrigerant to the
surrounding air or water?
A. Compressor
B. Evaporator
C. Condenser
D. Expansion valve
Answer: C
Rationale: The condenser rejects heat absorbed in the
evaporator and compression process.
Examination Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What is the primary function of a refrigeration system?
A. Increase air pressure
B. Remove heat from a controlled space
C. Generate electrical power
D. Compress water vapor
Answer: B
Rationale: The primary purpose of refrigeration is to transfer
heat from a low-temperature area to a higher-temperature area,
thereby cooling the controlled space.
2. Which component is responsible for increasing refrigerant
pressure in a system?
A. Evaporator
B. Expansion valve
, C. Compressor
D. Condenser
Answer: C
Rationale: The compressor raises the pressure and temperature
of the refrigerant vapor so it can release heat in the condenser.
3. What state does refrigerant leave the evaporator in under normal
operation?
A. High-pressure liquid
B. Low-pressure vapor
C. High-pressure vapor
D. Subcooled liquid
Answer: B
Rationale: As refrigerant absorbs heat in the evaporator, it
typically exits as a low-pressure vapor.
4. What is the function of the expansion device?
A. Heat rejection
B. Pressure reduction and flow control
C. Compression of refrigerant
D. Moisture removal from air
, Answer: B
Rationale: The expansion device reduces refrigerant pressure
and meters flow into the evaporator.
5. Which refrigerant property determines its ability to absorb heat?
A. Toxicity
B. Latent heat of vaporization
C. Color
D. Electrical conductivity
Answer: B
Rationale: Latent heat of vaporization determines how much
heat a refrigerant can absorb during phase change.
6. What is superheat?
A. Liquid refrigerant below boiling point
B. Vapor above saturation temperature
C. Liquid above saturation pressure
D. Solid refrigerant state
Answer: B
Rationale: Superheat is the temperature of refrigerant vapor
above its saturation point at a given pressure.
, 7. What is subcooling?
A. Vapor cooling below dew point
B. Liquid cooled below saturation temperature
C. Gas compressed below ambient
D. Heat added to vapor
Answer: B
Rationale: Subcooling refers to cooling liquid refrigerant below
its saturation temperature without changing phase.
8. Which component removes heat from refrigerant to the
surrounding air or water?
A. Compressor
B. Evaporator
C. Condenser
D. Expansion valve
Answer: C
Rationale: The condenser rejects heat absorbed in the
evaporator and compression process.
