COLORADO REFRIGERATION APPLIANCE
TECHNICIAN CERTIFICATION EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary function of a refrigeration system?
A. Increase pressure of gases
B. Remove heat from a designated space
C. Convert liquid to solid
D. Increase humidity
Rationale: Refrigeration systems work by extracting heat from
an enclosed space and rejecting it elsewhere.
Correct Answer: B. Remove heat from a designated space
2. Which refrigerant state absorbs the most heat?
A. Solid
B. Liquid
C. Vapor
D. Plasma
Rationale: Refrigerant absorbs heat most effectively during
evaporation (liquid to vapor phase).
Correct Answer: C. Vapor
,3. What component compresses refrigerant vapor in a
system?
A. Condenser
B. Expansion valve
C. Compressor
D. Evaporator
Rationale: The compressor increases refrigerant pressure and
temperature.
Correct Answer: C. Compressor
4. What is the role of the condenser?
A. Absorb heat
B. Release heat to surroundings
C. Meter refrigerant flow
D. Increase humidity
Rationale: The condenser rejects heat from refrigerant to the
outside environment.
Correct Answer: B. Release heat to surroundings
5. What device controls refrigerant flow into the evaporator?
A. Compressor
B. Expansion valve
C. Fan motor
D. Relay
,Rationale: The expansion valve regulates refrigerant flow and
pressure drop.
Correct Answer: B. Expansion valve
6. What is the function of the evaporator?
A. Release heat
B. Compress refrigerant
C. Absorb heat
D. Store refrigerant
Rationale: The evaporator absorbs heat from the cooled space.
Correct Answer: C. Absorb heat
7. Which law explains pressure increase when gas is
compressed?
A. Ohm’s Law
B. Boyle’s Law
C. Newton’s Law
D. Pascal’s Law
Rationale: Boyle’s Law states pressure increases as volume
decreases.
Correct Answer: B. Boyle’s Law
8. What happens to temperature when refrigerant pressure
drops?
, A. Increases
B. Decreases
C. Stays constant
D. Becomes unstable
Rationale: Lower pressure reduces saturation temperature.
Correct Answer: B. Decreases
9. Which component protects the compressor from liquid
refrigerant?
A. Filter drier
B. Accumulator
C. Thermostat
D. Relay
Rationale: The accumulator prevents liquid slugging of
compressor.
Correct Answer: B. Accumulator
10. What is the purpose of a filter drier?
A. Increase pressure
B. Remove moisture and contaminants
C. Cool refrigerant
D. Store refrigerant
Rationale: It removes moisture and debris from the system.
Correct Answer: B. Remove moisture and contaminants
TECHNICIAN CERTIFICATION EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary function of a refrigeration system?
A. Increase pressure of gases
B. Remove heat from a designated space
C. Convert liquid to solid
D. Increase humidity
Rationale: Refrigeration systems work by extracting heat from
an enclosed space and rejecting it elsewhere.
Correct Answer: B. Remove heat from a designated space
2. Which refrigerant state absorbs the most heat?
A. Solid
B. Liquid
C. Vapor
D. Plasma
Rationale: Refrigerant absorbs heat most effectively during
evaporation (liquid to vapor phase).
Correct Answer: C. Vapor
,3. What component compresses refrigerant vapor in a
system?
A. Condenser
B. Expansion valve
C. Compressor
D. Evaporator
Rationale: The compressor increases refrigerant pressure and
temperature.
Correct Answer: C. Compressor
4. What is the role of the condenser?
A. Absorb heat
B. Release heat to surroundings
C. Meter refrigerant flow
D. Increase humidity
Rationale: The condenser rejects heat from refrigerant to the
outside environment.
Correct Answer: B. Release heat to surroundings
5. What device controls refrigerant flow into the evaporator?
A. Compressor
B. Expansion valve
C. Fan motor
D. Relay
,Rationale: The expansion valve regulates refrigerant flow and
pressure drop.
Correct Answer: B. Expansion valve
6. What is the function of the evaporator?
A. Release heat
B. Compress refrigerant
C. Absorb heat
D. Store refrigerant
Rationale: The evaporator absorbs heat from the cooled space.
Correct Answer: C. Absorb heat
7. Which law explains pressure increase when gas is
compressed?
A. Ohm’s Law
B. Boyle’s Law
C. Newton’s Law
D. Pascal’s Law
Rationale: Boyle’s Law states pressure increases as volume
decreases.
Correct Answer: B. Boyle’s Law
8. What happens to temperature when refrigerant pressure
drops?
, A. Increases
B. Decreases
C. Stays constant
D. Becomes unstable
Rationale: Lower pressure reduces saturation temperature.
Correct Answer: B. Decreases
9. Which component protects the compressor from liquid
refrigerant?
A. Filter drier
B. Accumulator
C. Thermostat
D. Relay
Rationale: The accumulator prevents liquid slugging of
compressor.
Correct Answer: B. Accumulator
10. What is the purpose of a filter drier?
A. Increase pressure
B. Remove moisture and contaminants
C. Cool refrigerant
D. Store refrigerant
Rationale: It removes moisture and debris from the system.
Correct Answer: B. Remove moisture and contaminants
