Alabama Refrigeration Contractor Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A |Guaranteed Pass (GRADED A+)

Alabama Refrigeration Contractor
Exam Practice Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A
|Guaranteed Pass (GRADED A+)


Basic Refrigeration Principles

1. What is the primary purpose of a refrigeration system?

 A. To create cold
 B. To remove heat from a space or substance
 C. To increase humidity
 D. To generate electricity

Correct Answer: B

Rationale: Refrigeration does not create "cold"; it removes heat
by transferring it from a lower-temperature area to a higher-
temperature area .




2. Which component absorbs heat from the refrigerated
space?

, A. Condenser
 B. Compressor
 C. Evaporator
 D. Receiver

Correct Answer: C

Rationale: Refrigerant absorbs heat as it evaporates inside the
evaporator .




3. Which component rejects heat to the surroundings?

 A. Evaporator
 B. Condenser
 C. Accumulator
 D. Expansion valve

Correct Answer: B

Rationale: The condenser removes heat from the refrigerant and
transfers it to air or water .




4. What is the main function of the compressor?

 A. Reduce refrigerant pressure
 B. Remove moisture
 C. Raise refrigerant pressure and circulate refrigerant
 D. Store liquid refrigerant

, Correct Answer: C

Rationale: The compressor takes low-pressure vapor and
compresses it into high-pressure vapor .




5. What is the function of a metering device?

 A. Increase condenser pressure
 B. Control refrigerant flow into the evaporator
 C. Store refrigerant
 D. Remove oil

Correct Answer: B

Rationale: The expansion valve meters refrigerant into the
evaporator based on cooling demand .




6. What is superheat?

 A. Temperature of liquid below saturation
 B. Temperature of vapor above its saturation temperature
 C. Condenser temperature
 D. Pressure below atmospheric pressure

Correct Answer: B

Rationale: Superheat is the amount by which vapor temperature
exceeds its saturation temperature at a given pressure .

, 7. What is subcooling?

 A. Heating vapor above saturation
 B. Cooling liquid below its saturation temperature
 C. Cooling vapor below atmospheric temperature
 D. Increasing suction pressure

Correct Answer: B

Rationale: Subcooling indicates that liquid refrigerant is below its
saturation temperature at the measured pressure .




System Components & Operation

8. What is the purpose of a sight glass in a liquid line?

 A. Measure compressor horsepower
 B. Provide visual indication of refrigerant condition and moisture
indication
 C. Control suction pressure
 D. Measure evaporator superheat directly

Correct Answer: B

Rationale: A sight glass helps observe liquid-line conditions; a
moisture-indicating sight glass can also provide an indication of
moisture condition .