PEI Refrigeration Mechanic Certification
Practice Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What is the primary purpose of a refrigeration system?
A. To create heat
B. To transfer heat from one place to another
C. To destroy moisture
D. To increase air pressure
Answer: B
Refrigeration systems work by moving heat from a low-
temperature area to a higher-temperature area.
2. Which component compresses refrigerant vapor?
A. Condenser
B. Expansion valve
C. Evaporator
D. Compressor
Answer: D
The compressor raises the pressure and temperature of refrigerant
vapor.
3. Where does the refrigerant absorb heat?
A. Condenser
B. Evaporator
C. Receiver
, D. Filter drier
Answer: B
Heat absorption occurs in the evaporator.
4. Which state of refrigerant enters the compressor?
A. High-pressure liquid
B. Low-pressure vapor
C. High-pressure vapor
D. Low-pressure liquid
Answer: B
Refrigerant enters the compressor as a low-pressure vapor.
5. What device controls refrigerant flow into the evaporator?
A. Condenser fan
B. Oil separator
C. Metering device
D. Receiver
Answer: C
The metering device regulates refrigerant flow.
6. Which component rejects heat to the outside air?
A. Evaporator
B. Condenser
C. Accumulator
D. Suction line
Answer: B
The condenser releases heat absorbed from the refrigerated
space.
7. What happens to refrigerant pressure in the condenser?
A. Decreases rapidly
, B. Remains low
C. Increases and stays high
D. Drops to vacuum
Answer: C
The condenser operates at high pressure.
8. Which refrigerant condition exits the condenser?
A. Low-pressure vapor
B. High-pressure liquid
C. Low-pressure liquid
D. Flash gas
Answer: B
The condenser condenses vapor into high-pressure liquid.
9. What is superheat?
A. Heat removed in condenser
B. Temperature above saturation at suction
C. Liquid temperature below saturation
D. Oil temperature increase
Answer: B
Superheat measures vapor temperature above its boiling point.
10. What is subcooling?
A. Cooling of vapor
B. Liquid temperature below saturation
C. Vapor above boiling
D. Oil cooling
Answer: B
Subcooling ensures liquid refrigerant reaches the metering device.
Practice Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What is the primary purpose of a refrigeration system?
A. To create heat
B. To transfer heat from one place to another
C. To destroy moisture
D. To increase air pressure
Answer: B
Refrigeration systems work by moving heat from a low-
temperature area to a higher-temperature area.
2. Which component compresses refrigerant vapor?
A. Condenser
B. Expansion valve
C. Evaporator
D. Compressor
Answer: D
The compressor raises the pressure and temperature of refrigerant
vapor.
3. Where does the refrigerant absorb heat?
A. Condenser
B. Evaporator
C. Receiver
, D. Filter drier
Answer: B
Heat absorption occurs in the evaporator.
4. Which state of refrigerant enters the compressor?
A. High-pressure liquid
B. Low-pressure vapor
C. High-pressure vapor
D. Low-pressure liquid
Answer: B
Refrigerant enters the compressor as a low-pressure vapor.
5. What device controls refrigerant flow into the evaporator?
A. Condenser fan
B. Oil separator
C. Metering device
D. Receiver
Answer: C
The metering device regulates refrigerant flow.
6. Which component rejects heat to the outside air?
A. Evaporator
B. Condenser
C. Accumulator
D. Suction line
Answer: B
The condenser releases heat absorbed from the refrigerated
space.
7. What happens to refrigerant pressure in the condenser?
A. Decreases rapidly
, B. Remains low
C. Increases and stays high
D. Drops to vacuum
Answer: C
The condenser operates at high pressure.
8. Which refrigerant condition exits the condenser?
A. Low-pressure vapor
B. High-pressure liquid
C. Low-pressure liquid
D. Flash gas
Answer: B
The condenser condenses vapor into high-pressure liquid.
9. What is superheat?
A. Heat removed in condenser
B. Temperature above saturation at suction
C. Liquid temperature below saturation
D. Oil temperature increase
Answer: B
Superheat measures vapor temperature above its boiling point.
10. What is subcooling?
A. Cooling of vapor
B. Liquid temperature below saturation
C. Vapor above boiling
D. Oil cooling
Answer: B
Subcooling ensures liquid refrigerant reaches the metering device.
