Licensure Exam Practice Test Questions

Certified Refrigeration Technician Licensure Exam Practice Test Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which of the following is a primary purpose of a refrigeration system?
• Heat a room
• Cool and remove heat from a space
• Increase air pressure
• Humidify the air
• Cool and remove heat from a space

Rationale: The main function of refrigeration is to remove heat from

a space or substance to maintain a lower temperature.

• What is the most commonly used refrigerant in residential air

conditioning systems? 1 / 4

A. R-22

• R-134a

C. R-410A

• Ammonia

C. R-410A

Rationale: R-410A is widely used due to its efficiency and lower

ozone depletion potential compared to R-22.

• In a vapor-compression refrigeration cycle, which component removes

heat from the refrigerant?

• Compressor
• Condenser
• Evaporator
• Expansion valve
• Evaporator

Rationale: The evaporator absorbs heat from the space or substance

to be cooled, causing the refrigerant to vaporize.

4. The purpose of a compressor in a refrigeration system is to:

• Condense the refrigerant
• Expand the refrigerant
• Increase the refrigerant pressure and temperature
• Absorb heat from the environment
• Increase the refrigerant pressure and temperature 2 / 4

Rationale: The compressor raises the pressure and temperature of

the refrigerant vapor, enabling it to release heat in the condenser.

• Which of the following devices controls the flow of refrigerant into the

evaporator?

• Compressor
• Expansion valve
• Condenser
• Receiver
• Expansion valve

Rationale: The expansion valve reduces refrigerant pressure,

regulating its flow into the evaporator for efficient heat absorption.

• What type of refrigerant is R-134a?

A. HCFC

B. HFC

C. CFC

• Ammonia

B. HFC

Rationale: R-134a is a hydrofluorocarbon (HFC) refrigerant, with zero

ozone depletion potential.

• What is the function of a condenser in a refrigeration system?
• Absorb heat from the space
• Increase refrigerant velocity
• Remove heat from refrigerant and condense it to liquid 3 / 4

• Expand the refrigerant
• Remove heat from refrigerant and condense it to liquid

Rationale: The condenser releases heat to the environment, allowing

the refrigerant to condense from vapor to liquid.

• Which of the following is a sign of a refrigerant leak?
• Frost on the evaporator coil
• High suction pressure
• Low system performance
• Increased compressor noise
• Low system performance

Rationale: A refrigerant leak reduces system efficiency, leading to

inadequate cooling performance.

• What is the main purpose of a receiver in a refrigeration system?
• Store excess refrigerant
• Compress the refrigerant
• Evaporate the refrigerant
• Filter impurities
• Store excess refrigerant

Rationale: The receiver holds refrigerant that is not currently

circulating in the system, ensuring proper operation.

• What device prevents liquid refrigerant from entering the

compressor?

• Filter-drier
• / 4