ALABAMA REFRIGERATION CONTRACTOR EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2027|INSTANT DOWNLOAD PDF
1. What is the primary function of a refrigeration system?
A. To create cold air
B. To remove heat from a designated space or substance
C. To increase humidity
D. To generate electricity
Correct Answer: B. To remove heat from a designated space or
substance
Rationale: Refrigeration works by transferring heat from a
lower-temperature area to a higher-temperature area.
2. Which component compresses low-pressure refrigerant
vapor?
A. Evaporator
B. Condenser
C. Compressor
D. Expansion valve
Correct Answer: C. Compressor
Rationale: The compressor raises the pressure and
temperature of refrigerant vapor before it enters the
condenser.
,3. What is the primary function of the evaporator?
A. Reject heat
B. Absorb heat
C. Increase refrigerant pressure
D. Store oil
Correct Answer: B. Absorb heat
Rationale: Refrigerant absorbs heat from the conditioned space
as it evaporates in the evaporator.
4. What happens to refrigerant in a properly operating
evaporator?
A. It condenses
B. It freezes
C. It evaporates
D. It becomes solid
Correct Answer: C. It evaporates
Rationale: Heat absorbed from the space causes the liquid
refrigerant to boil and become vapor.
5. What is the primary purpose of a condenser?
A. Absorb indoor heat
B. Reject heat and condense refrigerant vapor
C. Meter refrigerant
D. Filter air
,Correct Answer: B. Reject heat and condense refrigerant vapor
Rationale: The condenser removes heat from the refrigerant,
allowing high-pressure vapor to become liquid.
6. Which component controls the flow of refrigerant into the
evaporator?
A. Compressor
B. Metering device
C. Condenser fan
D. Receiver
Correct Answer: B. Metering device
Rationale: A TXV, capillary tube, or electronic expansion valve
regulates refrigerant entering the evaporator.
7. What is superheat?
A. Temperature of liquid below saturation
B. Temperature of vapor above its saturation temperature
C. Condenser pressure
D. Refrigerant weight
Correct Answer: B. Temperature of vapor above its saturation
temperature
Rationale: Superheat is the amount by which vapor
temperature exceeds its saturation temperature at a given
pressure.
, 8. What is subcooling?
A. Heating vapor above saturation
B. Cooling liquid below its saturation temperature
C. Increasing suction pressure
D. Increasing compressor temperature
Correct Answer: B. Cooling liquid below its saturation
temperature
Rationale: Subcooling indicates how far liquid refrigerant
temperature is below its saturation temperature.
9. Which instrument is commonly used to measure
refrigeration system pressures?
A. Ohmmeter
B. Manifold gauge set
C. Tachometer
D. Hydrometer
Correct Answer: B. Manifold gauge set
Rationale: Manifold gauges allow technicians to measure low-
and high-side refrigeration pressures.
10. What does refrigerant pressure generally determine?
A. Saturation temperature
B. Wire resistance
C. Motor horsepower
D. Air velocity only
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2027|INSTANT DOWNLOAD PDF
1. What is the primary function of a refrigeration system?
A. To create cold air
B. To remove heat from a designated space or substance
C. To increase humidity
D. To generate electricity
Correct Answer: B. To remove heat from a designated space or
substance
Rationale: Refrigeration works by transferring heat from a
lower-temperature area to a higher-temperature area.
2. Which component compresses low-pressure refrigerant
vapor?
A. Evaporator
B. Condenser
C. Compressor
D. Expansion valve
Correct Answer: C. Compressor
Rationale: The compressor raises the pressure and
temperature of refrigerant vapor before it enters the
condenser.
,3. What is the primary function of the evaporator?
A. Reject heat
B. Absorb heat
C. Increase refrigerant pressure
D. Store oil
Correct Answer: B. Absorb heat
Rationale: Refrigerant absorbs heat from the conditioned space
as it evaporates in the evaporator.
4. What happens to refrigerant in a properly operating
evaporator?
A. It condenses
B. It freezes
C. It evaporates
D. It becomes solid
Correct Answer: C. It evaporates
Rationale: Heat absorbed from the space causes the liquid
refrigerant to boil and become vapor.
5. What is the primary purpose of a condenser?
A. Absorb indoor heat
B. Reject heat and condense refrigerant vapor
C. Meter refrigerant
D. Filter air
,Correct Answer: B. Reject heat and condense refrigerant vapor
Rationale: The condenser removes heat from the refrigerant,
allowing high-pressure vapor to become liquid.
6. Which component controls the flow of refrigerant into the
evaporator?
A. Compressor
B. Metering device
C. Condenser fan
D. Receiver
Correct Answer: B. Metering device
Rationale: A TXV, capillary tube, or electronic expansion valve
regulates refrigerant entering the evaporator.
7. What is superheat?
A. Temperature of liquid below saturation
B. Temperature of vapor above its saturation temperature
C. Condenser pressure
D. Refrigerant weight
Correct Answer: B. Temperature of vapor above its saturation
temperature
Rationale: Superheat is the amount by which vapor
temperature exceeds its saturation temperature at a given
pressure.
, 8. What is subcooling?
A. Heating vapor above saturation
B. Cooling liquid below its saturation temperature
C. Increasing suction pressure
D. Increasing compressor temperature
Correct Answer: B. Cooling liquid below its saturation
temperature
Rationale: Subcooling indicates how far liquid refrigerant
temperature is below its saturation temperature.
9. Which instrument is commonly used to measure
refrigeration system pressures?
A. Ohmmeter
B. Manifold gauge set
C. Tachometer
D. Hydrometer
Correct Answer: B. Manifold gauge set
Rationale: Manifold gauges allow technicians to measure low-
and high-side refrigeration pressures.
10. What does refrigerant pressure generally determine?
A. Saturation temperature
B. Wire resistance
C. Motor horsepower
D. Air velocity only
