Apprentice Refrigeration Technician
Examination Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
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1.
A refrigeration system’s primary purpose is to:
A. Increase pressure in a closed loop
B. Transfer heat from a low-temperature area to a high-temperature
area
C. Generate cold air directly
D. Eliminate humidity completely
Answer: B
Rationale: A refrigeration system does not create cold; it moves heat
from a cooler space (evaporator side) to a warmer space (condenser
side) using mechanical work.
2.
,Which component compresses refrigerant vapor in a refrigeration
system?
A. Expansion valve
B. Evaporator
C. Compressor
D. Condenser
Answer: C
Rationale: The compressor raises the pressure and temperature of the
refrigerant vapor so it can reject heat in the condenser.
3.
What happens to refrigerant in the evaporator?
A. It releases heat and condenses
B. It absorbs heat and evaporates
C. It becomes a solid
D. It is filtered and purified
Answer: B
Rationale: In the evaporator, refrigerant absorbs heat from the
surrounding environment and changes from liquid to vapor.
4.
,The function of the condenser is to:
A. Expand refrigerant
B. Remove heat from refrigerant
C. Compress liquid refrigerant
D. Measure system pressure
Answer: B
Rationale: The condenser rejects heat absorbed in the evaporator and
compression process, turning refrigerant vapor into liquid.
5.
Which device meters refrigerant flow into the evaporator?
A. Compressor
B. Expansion valve
C. Receiver
D. Accumulator
Answer: B
Rationale: The expansion valve controls refrigerant flow and reduces
pressure before entry into the evaporator.
6.
, Refrigerant changes from liquid to vapor during:
A. Compression
B. Condensation
C. Evaporation
D. Subcooling
Answer: C
Rationale: Evaporation is the phase change where liquid refrigerant
absorbs heat and becomes vapor.
7.
Superheat refers to refrigerant that is:
A. Below saturation temperature
B. At freezing point
C. Above saturation temperature as vapor
D. Fully condensed liquid
Answer: C
Rationale: Superheat is the temperature increase of vapor refrigerant
beyond its boiling point at a given pressure.
8.
Examination Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1.
A refrigeration system’s primary purpose is to:
A. Increase pressure in a closed loop
B. Transfer heat from a low-temperature area to a high-temperature
area
C. Generate cold air directly
D. Eliminate humidity completely
Answer: B
Rationale: A refrigeration system does not create cold; it moves heat
from a cooler space (evaporator side) to a warmer space (condenser
side) using mechanical work.
2.
,Which component compresses refrigerant vapor in a refrigeration
system?
A. Expansion valve
B. Evaporator
C. Compressor
D. Condenser
Answer: C
Rationale: The compressor raises the pressure and temperature of the
refrigerant vapor so it can reject heat in the condenser.
3.
What happens to refrigerant in the evaporator?
A. It releases heat and condenses
B. It absorbs heat and evaporates
C. It becomes a solid
D. It is filtered and purified
Answer: B
Rationale: In the evaporator, refrigerant absorbs heat from the
surrounding environment and changes from liquid to vapor.
4.
,The function of the condenser is to:
A. Expand refrigerant
B. Remove heat from refrigerant
C. Compress liquid refrigerant
D. Measure system pressure
Answer: B
Rationale: The condenser rejects heat absorbed in the evaporator and
compression process, turning refrigerant vapor into liquid.
5.
Which device meters refrigerant flow into the evaporator?
A. Compressor
B. Expansion valve
C. Receiver
D. Accumulator
Answer: B
Rationale: The expansion valve controls refrigerant flow and reduces
pressure before entry into the evaporator.
6.
, Refrigerant changes from liquid to vapor during:
A. Compression
B. Condensation
C. Evaporation
D. Subcooling
Answer: C
Rationale: Evaporation is the phase change where liquid refrigerant
absorbs heat and becomes vapor.
7.
Superheat refers to refrigerant that is:
A. Below saturation temperature
B. At freezing point
C. Above saturation temperature as vapor
D. Fully condensed liquid
Answer: C
Rationale: Superheat is the temperature increase of vapor refrigerant
beyond its boiling point at a given pressure.
8.
