LOUISIANA INDUSTRIALREFRIGERATION EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2027|INSTANT DOWNLOAD PDF
1. What is the primary purpose of a refrigeration system?
A. To generate heat
B. To transfer heat from a low-temperature area to a higher-
temperature area
C. To increase atmospheric pressure
D. To remove oxygen
Rationale: Refrigeration systems move heat from a space or
substance that needs cooling to another location where the
heat can be rejected.
Correct Answer: B. To transfer heat from a low-temperature
area to a higher-temperature area
2. Which component raises the pressure of refrigerant vapor
in a refrigeration cycle?
A. Evaporator
B. Condenser
C. Compressor
D. Receiver
Rationale: The compressor takes low-pressure vapor and
compresses it into a high-pressure, high-temperature vapor.
Correct Answer: C. Compressor
,3. What is the primary function of the evaporator?
A. Reject heat
B. Absorb heat
C. Store liquid refrigerant
D. Increase refrigerant pressure
Rationale: Refrigerant absorbs heat from the refrigerated space
while evaporating in the evaporator.
Correct Answer: B. Absorb heat
4. Which component rejects heat from the refrigerant to the
surroundings?
A. Evaporator
B. Condenser
C. Expansion valve
D. Compressor crankcase
Rationale: The condenser removes heat from high-pressure
refrigerant vapor and changes it into liquid.
Correct Answer: B. Condenser
5. What is the function of an expansion valve?
A. Increase refrigerant pressure
B. Reduce refrigerant pressure
C. Compress vapor
D. Remove oil
Rationale: The expansion device creates a pressure drop that
allows liquid refrigerant to enter the evaporator at a lower
,temperature.
Correct Answer: B. Reduce refrigerant pressure
6. What state of refrigerant normally enters a refrigeration
compressor?
A. High-pressure liquid
B. Low-pressure vapor
C. High-pressure liquid-vapor mixture
D. Solid refrigerant
Rationale: Compressors are designed to compress vapor rather
than liquid.
Correct Answer: B. Low-pressure vapor
7. Why is liquid refrigerant entering a compressor
undesirable?
A. It increases cooling capacity safely
B. It can cause mechanical damage
C. It reduces condenser pressure
D. It improves lubrication
Rationale: Liquid is essentially incompressible and can cause
liquid slugging, damaging valves, pistons, or other compressor
components.
Correct Answer: B. It can cause mechanical damage
8. What does superheat describe in a refrigeration system?
A. Liquid temperature below saturation
B. Vapor temperature above its saturation temperature
, C. Condenser pressure
D. Oil temperature only
Rationale: Superheat is the amount by which a vapor's actual
temperature exceeds its saturation temperature at a given
pressure.
Correct Answer: B. Vapor temperature above its saturation
temperature
9. What does subcooling indicate?
A. Vapor above saturation temperature
B. Liquid below its saturation temperature
C. Compressor overheating
D. Refrigerant freezing
Rationale: Subcooling is the temperature difference between a
liquid's saturation temperature and its actual temperature.
Correct Answer: B. Liquid below its saturation temperature
10. Which measurement is commonly used to determine
refrigerant saturation temperature?
A. Voltage
B. Pressure
C. Amperage
D. Humidity
Rationale: Refrigerant pressure corresponds to a saturation
temperature for a specific refrigerant.
Correct Answer: B. Pressure
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2027|INSTANT DOWNLOAD PDF
1. What is the primary purpose of a refrigeration system?
A. To generate heat
B. To transfer heat from a low-temperature area to a higher-
temperature area
C. To increase atmospheric pressure
D. To remove oxygen
Rationale: Refrigeration systems move heat from a space or
substance that needs cooling to another location where the
heat can be rejected.
Correct Answer: B. To transfer heat from a low-temperature
area to a higher-temperature area
2. Which component raises the pressure of refrigerant vapor
in a refrigeration cycle?
A. Evaporator
B. Condenser
C. Compressor
D. Receiver
Rationale: The compressor takes low-pressure vapor and
compresses it into a high-pressure, high-temperature vapor.
Correct Answer: C. Compressor
,3. What is the primary function of the evaporator?
A. Reject heat
B. Absorb heat
C. Store liquid refrigerant
D. Increase refrigerant pressure
Rationale: Refrigerant absorbs heat from the refrigerated space
while evaporating in the evaporator.
Correct Answer: B. Absorb heat
4. Which component rejects heat from the refrigerant to the
surroundings?
A. Evaporator
B. Condenser
C. Expansion valve
D. Compressor crankcase
Rationale: The condenser removes heat from high-pressure
refrigerant vapor and changes it into liquid.
Correct Answer: B. Condenser
5. What is the function of an expansion valve?
A. Increase refrigerant pressure
B. Reduce refrigerant pressure
C. Compress vapor
D. Remove oil
Rationale: The expansion device creates a pressure drop that
allows liquid refrigerant to enter the evaporator at a lower
,temperature.
Correct Answer: B. Reduce refrigerant pressure
6. What state of refrigerant normally enters a refrigeration
compressor?
A. High-pressure liquid
B. Low-pressure vapor
C. High-pressure liquid-vapor mixture
D. Solid refrigerant
Rationale: Compressors are designed to compress vapor rather
than liquid.
Correct Answer: B. Low-pressure vapor
7. Why is liquid refrigerant entering a compressor
undesirable?
A. It increases cooling capacity safely
B. It can cause mechanical damage
C. It reduces condenser pressure
D. It improves lubrication
Rationale: Liquid is essentially incompressible and can cause
liquid slugging, damaging valves, pistons, or other compressor
components.
Correct Answer: B. It can cause mechanical damage
8. What does superheat describe in a refrigeration system?
A. Liquid temperature below saturation
B. Vapor temperature above its saturation temperature
, C. Condenser pressure
D. Oil temperature only
Rationale: Superheat is the amount by which a vapor's actual
temperature exceeds its saturation temperature at a given
pressure.
Correct Answer: B. Vapor temperature above its saturation
temperature
9. What does subcooling indicate?
A. Vapor above saturation temperature
B. Liquid below its saturation temperature
C. Compressor overheating
D. Refrigerant freezing
Rationale: Subcooling is the temperature difference between a
liquid's saturation temperature and its actual temperature.
Correct Answer: B. Liquid below its saturation temperature
10. Which measurement is commonly used to determine
refrigerant saturation temperature?
A. Voltage
B. Pressure
C. Amperage
D. Humidity
Rationale: Refrigerant pressure corresponds to a saturation
temperature for a specific refrigerant.
Correct Answer: B. Pressure
