REFRIGERATION TECHNICIAN PRACTICE
EXAM 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. Heat generation
B. Moisture removal
C. Heat removal
D. Air filtration
Rationale: Refrigeration systems are designed to remove heat
from a space.
2. Which refrigerant is commonly used in modern systems due to
environmental safety?
A. R-22
B. R-12
C. R-410A
D. Ammonia
Rationale: R-410A is widely used because it does not deplete
ozone.
3. What component compresses refrigerant vapor?
A. Evaporator
B. Condenser
C. Expansion valve
, D. Compressor
Rationale: The compressor raises refrigerant pressure and
temperature.
4. The evaporator is responsible for:
A. Rejecting heat
B. Compressing gas
C. Absorbing heat
D. Filtering air
Rationale: The evaporator absorbs heat from the conditioned
space.
5. What state does refrigerant leave the evaporator?
A. Liquid
B. Solid
C. Vapor
D. Slurry
Rationale: Refrigerant evaporates into a vapor after absorbing
heat.
6. The condenser converts vapor into:
A. Gas
B. Ice
C. Liquid
D. Plasma
Rationale: The condenser rejects heat and condenses vapor into
liquid.
7. What device controls refrigerant flow into the evaporator?
A. Compressor
B. Expansion valve
, C. Fan
D. Filter drier
Rationale: The expansion valve regulates refrigerant flow.
8. What does superheat indicate?
A. Liquid temperature
B. Vapor temperature above saturation
C. Pressure drop
D. Oil level
Rationale: Superheat is the temperature above boiling point.
9. What does subcooling measure?
A. Gas temperature
B. Pressure increase
C. Liquid cooling below condensation point
D. Motor speed
Rationale: Subcooling ensures liquid refrigerant is fully condensed.
10. A low refrigerant charge causes:
A. High pressure
B. Low cooling performance
C. High voltage
D. Compressor overheating only
Rationale: Low charge reduces system efficiency.
11. What tool measures refrigerant pressure?
A. Thermometer
B. Ammeter
C. Manifold gauge set
D. Psychrometer
Rationale: Manifold gauges measure system pressures.
EXAM 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. Heat generation
B. Moisture removal
C. Heat removal
D. Air filtration
Rationale: Refrigeration systems are designed to remove heat
from a space.
2. Which refrigerant is commonly used in modern systems due to
environmental safety?
A. R-22
B. R-12
C. R-410A
D. Ammonia
Rationale: R-410A is widely used because it does not deplete
ozone.
3. What component compresses refrigerant vapor?
A. Evaporator
B. Condenser
C. Expansion valve
, D. Compressor
Rationale: The compressor raises refrigerant pressure and
temperature.
4. The evaporator is responsible for:
A. Rejecting heat
B. Compressing gas
C. Absorbing heat
D. Filtering air
Rationale: The evaporator absorbs heat from the conditioned
space.
5. What state does refrigerant leave the evaporator?
A. Liquid
B. Solid
C. Vapor
D. Slurry
Rationale: Refrigerant evaporates into a vapor after absorbing
heat.
6. The condenser converts vapor into:
A. Gas
B. Ice
C. Liquid
D. Plasma
Rationale: The condenser rejects heat and condenses vapor into
liquid.
7. What device controls refrigerant flow into the evaporator?
A. Compressor
B. Expansion valve
, C. Fan
D. Filter drier
Rationale: The expansion valve regulates refrigerant flow.
8. What does superheat indicate?
A. Liquid temperature
B. Vapor temperature above saturation
C. Pressure drop
D. Oil level
Rationale: Superheat is the temperature above boiling point.
9. What does subcooling measure?
A. Gas temperature
B. Pressure increase
C. Liquid cooling below condensation point
D. Motor speed
Rationale: Subcooling ensures liquid refrigerant is fully condensed.
10. A low refrigerant charge causes:
A. High pressure
B. Low cooling performance
C. High voltage
D. Compressor overheating only
Rationale: Low charge reduces system efficiency.
11. What tool measures refrigerant pressure?
A. Thermometer
B. Ammeter
C. Manifold gauge set
D. Psychrometer
Rationale: Manifold gauges measure system pressures.
