Cfesa Refrigeration Technician
Certification Exam Newest Evaluated
PRACTICE QUESTIONS |ORIGINAL
QUESTIONS & ANSWERS |DETAILED
RATIONALES |HINTED COMPLETE
EXAM PREP GRADED A+*INSTANT
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Section 1 — Refrigeration Fundamentals
1.
What is the primary purpose of a vapor-compression refrigeration
system?
A. Create cold air
B. Convert electricity directly into cold
C. Transfer heat from a low-temperature area to a higher-
temperature area
D. Remove oxygen from the refrigerated space
Refrigeration does not create “cold.” The system removes heat from
the refrigerated space and rejects it to a warmer environment.
2.
Which component raises the pressure of refrigerant vapor?
A. Evaporator
B. Condenser
,C. Metering device
D. Compressor
The compressor draws low-pressure vapor from the evaporator and
compresses it into high-pressure, high-temperature vapor.
3.
Where does refrigerant normally absorb heat from the refrigerated
space?
A. Compressor
B. Condenser
C. Evaporator
D. Receiver
The evaporator is the heat-absorbing portion of the refrigeration
circuit.
4.
Where is heat rejected from the refrigerant?
A. Evaporator
B. Compressor suction
C. Expansion device
D. Condenser
The condenser removes heat from the high-pressure refrigerant and
transfers it to air or another cooling medium.
5.
What happens to refrigerant pressure across a typical thermostatic
expansion valve?
A. It increases substantially
B. It remains constant
C. It decreases
D. It becomes atmospheric
,The metering device creates a pressure drop that allows the
refrigerant to evaporate at a lower temperature.
6.
The refrigeration cycle generally proceeds in which order?
A. Condenser → evaporator → compressor → metering device
B. Compressor → condenser → metering device → evaporator
C. Evaporator → condenser → metering device → compressor
D. Metering device → compressor → evaporator → condenser
This is the normal sequence for a basic vapor-compression system.
7.
What is sensible heat?
A. Heat associated only with boiling
B. Heat that changes a substance's chemical composition
C. Heat that changes temperature without changing phase
D. Heat that exists only in refrigerant vapor
Sensible heat produces a measurable temperature change without a
phase change.
8.
What is latent heat?
A. Heat that changes temperature only
B. Heat associated with a change of state
C. Heat produced by electrical resistance
D. Heat caused by pressure alone
Latent heat is involved when a substance changes between solid,
liquid, and vapor states.
9.
, A refrigerant boiling inside an evaporator is undergoing what
process?
A. Condensation
B. Compression
C. Evaporation
D. Desuperheating
The refrigerant absorbs heat while changing from liquid toward
vapor.
10.
Refrigerant condensing in a condenser changes from:
A. Liquid to solid
B. Liquid to vapor
C. Vapor to liquid
D. Solid to vapor
Condensation occurs when refrigerant vapor rejects sufficient heat to
become liquid.
11.
Why does lowering evaporator pressure generally lower evaporating
temperature?
A. Refrigerant becomes electrically conductive
B. The pressure-temperature relationship changes the refrigerant's
boiling point
C. Air pressure increases
D. The compressor stops circulating refrigerant
Refrigerants boil at lower temperatures when their pressure is
reduced.
12.
Certification Exam Newest Evaluated
PRACTICE QUESTIONS |ORIGINAL
QUESTIONS & ANSWERS |DETAILED
RATIONALES |HINTED COMPLETE
EXAM PREP GRADED A+*INSTANT
DOWNLOAD PDF
Section 1 — Refrigeration Fundamentals
1.
What is the primary purpose of a vapor-compression refrigeration
system?
A. Create cold air
B. Convert electricity directly into cold
C. Transfer heat from a low-temperature area to a higher-
temperature area
D. Remove oxygen from the refrigerated space
Refrigeration does not create “cold.” The system removes heat from
the refrigerated space and rejects it to a warmer environment.
2.
Which component raises the pressure of refrigerant vapor?
A. Evaporator
B. Condenser
,C. Metering device
D. Compressor
The compressor draws low-pressure vapor from the evaporator and
compresses it into high-pressure, high-temperature vapor.
3.
Where does refrigerant normally absorb heat from the refrigerated
space?
A. Compressor
B. Condenser
C. Evaporator
D. Receiver
The evaporator is the heat-absorbing portion of the refrigeration
circuit.
4.
Where is heat rejected from the refrigerant?
A. Evaporator
B. Compressor suction
C. Expansion device
D. Condenser
The condenser removes heat from the high-pressure refrigerant and
transfers it to air or another cooling medium.
5.
What happens to refrigerant pressure across a typical thermostatic
expansion valve?
A. It increases substantially
B. It remains constant
C. It decreases
D. It becomes atmospheric
,The metering device creates a pressure drop that allows the
refrigerant to evaporate at a lower temperature.
6.
The refrigeration cycle generally proceeds in which order?
A. Condenser → evaporator → compressor → metering device
B. Compressor → condenser → metering device → evaporator
C. Evaporator → condenser → metering device → compressor
D. Metering device → compressor → evaporator → condenser
This is the normal sequence for a basic vapor-compression system.
7.
What is sensible heat?
A. Heat associated only with boiling
B. Heat that changes a substance's chemical composition
C. Heat that changes temperature without changing phase
D. Heat that exists only in refrigerant vapor
Sensible heat produces a measurable temperature change without a
phase change.
8.
What is latent heat?
A. Heat that changes temperature only
B. Heat associated with a change of state
C. Heat produced by electrical resistance
D. Heat caused by pressure alone
Latent heat is involved when a substance changes between solid,
liquid, and vapor states.
9.
, A refrigerant boiling inside an evaporator is undergoing what
process?
A. Condensation
B. Compression
C. Evaporation
D. Desuperheating
The refrigerant absorbs heat while changing from liquid toward
vapor.
10.
Refrigerant condensing in a condenser changes from:
A. Liquid to solid
B. Liquid to vapor
C. Vapor to liquid
D. Solid to vapor
Condensation occurs when refrigerant vapor rejects sufficient heat to
become liquid.
11.
Why does lowering evaporator pressure generally lower evaporating
temperature?
A. Refrigerant becomes electrically conductive
B. The pressure-temperature relationship changes the refrigerant's
boiling point
C. Air pressure increases
D. The compressor stops circulating refrigerant
Refrigerants boil at lower temperatures when their pressure is
reduced.
12.
