CFESA Refrigeration Certification Exam 2026/2027 | 200+
Practice Questions, Correct Answers & Detailed Rationales
SECTION 1: REFRIGERATION FUNDAMENTALS
1. What is the primary purpose of a commercial refrigeration system?
A. To create cold air indefinitely
B. To remove heat from a controlled space or product
C. To increase humidity inside the cabinet
D. To convert electricity directly into cold
Correct Answer: B. To remove heat from a controlled space or product
Rationale: Refrigeration works by transferring heat from a lower-temperature
space to a higher-temperature environment.
2. Which principle is fundamental to mechanical refrigeration?
A. Heat naturally moves from cold to hot
B. Heat can be transferred from a colder region to a warmer region by mechanical
work
C. Refrigerants permanently destroy heat
D. Pressure has no effect on refrigerant temperature
Correct Answer: B. Heat can be transferred from a colder region to a warmer
region by mechanical work
Rationale: The refrigeration cycle uses compressor work to move heat against its
natural direction of flow.
3. What is the basic function of refrigerant in a refrigeration system?
A. To absorb and reject heat
B. To lubricate the evaporator only
C. To increase electrical resistance
D. To prevent compressor rotation
,Correct Answer: A. To absorb and reject heat
Rationale: Refrigerant absorbs heat during evaporation and rejects heat during
condensation.
4. Which component raises the pressure of refrigerant vapor?
A. Evaporator
B. Condenser
C. Compressor
D. Expansion device
Correct Answer: C. Compressor
Rationale: The compressor takes low-pressure vapor and compresses it into a
higher-pressure vapor.
5. What occurs in the evaporator?
A. Refrigerant rejects heat to ambient air
B. Refrigerant absorbs heat from the refrigerated space
C. Refrigerant is mechanically compressed
D. Oil is separated from the compressor
Correct Answer: B. Refrigerant absorbs heat from the refrigerated space
Rationale: The evaporator is the heat-absorbing portion of the refrigeration cycle.
6. What occurs in the condenser?
A. Refrigerant absorbs heat from the box
B. Refrigerant rejects heat to the surrounding environment
C. Refrigerant pressure falls to suction pressure
D. Refrigerant is always frozen
Correct Answer: B. Refrigerant rejects heat to the surrounding environment
Rationale: High-pressure refrigerant vapor releases heat in the condenser and
changes toward a liquid state.
7. What is the purpose of an expansion device?
,A. Increase refrigerant pressure
B. Meter refrigerant into the evaporator and reduce its pressure
C. Compress refrigerant vapor
D. Remove oil from the compressor
Correct Answer: B. Meter refrigerant into the evaporator and reduce its pressure
Rationale: The expansion device controls refrigerant flow and creates the pressure
drop required for evaporation.
8. Which sequence represents the basic vapor-compression cycle?
A. Compressor → condenser → expansion device → evaporator
B. Evaporator → condenser → compressor → expansion device
C. Condenser → evaporator → compressor → expansion device
D. Expansion device → compressor → condenser → evaporator
Correct Answer: A. Compressor → condenser → expansion device → evaporator
Rationale: Refrigerant leaves the compressor, rejects heat in the condenser,
expands, and then absorbs heat in the evaporator.
9. Refrigeration is best described as:
A. Production of cold
B. Removal of heat
C. Elimination of humidity
D. Generation of pressure
Correct Answer: B. Removal of heat
Rationale: “Cold” is not produced as a substance; refrigeration removes heat from
a desired area.
10. Which state normally enters the compressor in a properly operating vapor-
compression system?
A. High-pressure liquid
B. Low-pressure vapor
C. High-pressure liquid-vapor mixture
D. Solid refrigerant
, Correct Answer: B. Low-pressure vapor
Rationale: The compressor is designed to compress vapor rather than liquid.
SECTION 2: HEAT AND TEMPERATURE
11. What is sensible heat?
A. Heat that causes a change of state without changing temperature
B. Heat that changes temperature without changing state
C. Heat contained only in ice
D. Heat produced exclusively by compressors
Correct Answer: B. Heat that changes temperature without changing state
Rationale: Sensible heat can be measured as a temperature change without a
phase change.
12. What is latent heat?
A. Heat associated with a change of state
B. Heat that changes temperature only
C. Electrical heat from a motor
D. Heat found only in gases
Correct Answer: A. Heat associated with a change of state
Rationale: Latent heat is absorbed or released during phase changes such as
boiling or condensation.
13. During boiling, refrigerant primarily absorbs:
A. Latent heat
B. Electrical energy only
C. Mechanical energy only
D. Sound energy
Correct Answer: A. Latent heat
Rationale: Refrigerant absorbs latent heat as it changes from liquid to vapor.
Practice Questions, Correct Answers & Detailed Rationales
SECTION 1: REFRIGERATION FUNDAMENTALS
1. What is the primary purpose of a commercial refrigeration system?
A. To create cold air indefinitely
B. To remove heat from a controlled space or product
C. To increase humidity inside the cabinet
D. To convert electricity directly into cold
Correct Answer: B. To remove heat from a controlled space or product
Rationale: Refrigeration works by transferring heat from a lower-temperature
space to a higher-temperature environment.
2. Which principle is fundamental to mechanical refrigeration?
A. Heat naturally moves from cold to hot
B. Heat can be transferred from a colder region to a warmer region by mechanical
work
C. Refrigerants permanently destroy heat
D. Pressure has no effect on refrigerant temperature
Correct Answer: B. Heat can be transferred from a colder region to a warmer
region by mechanical work
Rationale: The refrigeration cycle uses compressor work to move heat against its
natural direction of flow.
3. What is the basic function of refrigerant in a refrigeration system?
A. To absorb and reject heat
B. To lubricate the evaporator only
C. To increase electrical resistance
D. To prevent compressor rotation
,Correct Answer: A. To absorb and reject heat
Rationale: Refrigerant absorbs heat during evaporation and rejects heat during
condensation.
4. Which component raises the pressure of refrigerant vapor?
A. Evaporator
B. Condenser
C. Compressor
D. Expansion device
Correct Answer: C. Compressor
Rationale: The compressor takes low-pressure vapor and compresses it into a
higher-pressure vapor.
5. What occurs in the evaporator?
A. Refrigerant rejects heat to ambient air
B. Refrigerant absorbs heat from the refrigerated space
C. Refrigerant is mechanically compressed
D. Oil is separated from the compressor
Correct Answer: B. Refrigerant absorbs heat from the refrigerated space
Rationale: The evaporator is the heat-absorbing portion of the refrigeration cycle.
6. What occurs in the condenser?
A. Refrigerant absorbs heat from the box
B. Refrigerant rejects heat to the surrounding environment
C. Refrigerant pressure falls to suction pressure
D. Refrigerant is always frozen
Correct Answer: B. Refrigerant rejects heat to the surrounding environment
Rationale: High-pressure refrigerant vapor releases heat in the condenser and
changes toward a liquid state.
7. What is the purpose of an expansion device?
,A. Increase refrigerant pressure
B. Meter refrigerant into the evaporator and reduce its pressure
C. Compress refrigerant vapor
D. Remove oil from the compressor
Correct Answer: B. Meter refrigerant into the evaporator and reduce its pressure
Rationale: The expansion device controls refrigerant flow and creates the pressure
drop required for evaporation.
8. Which sequence represents the basic vapor-compression cycle?
A. Compressor → condenser → expansion device → evaporator
B. Evaporator → condenser → compressor → expansion device
C. Condenser → evaporator → compressor → expansion device
D. Expansion device → compressor → condenser → evaporator
Correct Answer: A. Compressor → condenser → expansion device → evaporator
Rationale: Refrigerant leaves the compressor, rejects heat in the condenser,
expands, and then absorbs heat in the evaporator.
9. Refrigeration is best described as:
A. Production of cold
B. Removal of heat
C. Elimination of humidity
D. Generation of pressure
Correct Answer: B. Removal of heat
Rationale: “Cold” is not produced as a substance; refrigeration removes heat from
a desired area.
10. Which state normally enters the compressor in a properly operating vapor-
compression system?
A. High-pressure liquid
B. Low-pressure vapor
C. High-pressure liquid-vapor mixture
D. Solid refrigerant
, Correct Answer: B. Low-pressure vapor
Rationale: The compressor is designed to compress vapor rather than liquid.
SECTION 2: HEAT AND TEMPERATURE
11. What is sensible heat?
A. Heat that causes a change of state without changing temperature
B. Heat that changes temperature without changing state
C. Heat contained only in ice
D. Heat produced exclusively by compressors
Correct Answer: B. Heat that changes temperature without changing state
Rationale: Sensible heat can be measured as a temperature change without a
phase change.
12. What is latent heat?
A. Heat associated with a change of state
B. Heat that changes temperature only
C. Electrical heat from a motor
D. Heat found only in gases
Correct Answer: A. Heat associated with a change of state
Rationale: Latent heat is absorbed or released during phase changes such as
boiling or condensation.
13. During boiling, refrigerant primarily absorbs:
A. Latent heat
B. Electrical energy only
C. Mechanical energy only
D. Sound energy
Correct Answer: A. Latent heat
Rationale: Refrigerant absorbs latent heat as it changes from liquid to vapor.
