Basic Refrigeration Final Exam 2026 | Most Tested Questions &
Verified Answers | Latest Update | Graded A+
1. The refrigerant R-134a belongs to the following safety group:
A1
B1
A2
A3
2. If a refrigeration system is using R-134a and needs to be replaced with a
more environmentally friendly option, which refrigerant could be
considered?
R-22
R-1234yf
R-410A
R-404A
3. What is the primary role of the evaporator in a refrigeration system?
It compresses the refrigerant.
It releases heat to the environment.
It regulates the flow of refrigerant.
It absorbs heat from the environment.
4. Describe the significance of classifying refrigerants like R-500 in refrigeration
systems.
, Classifying refrigerants helps in understanding their properties,
safety measures, and appropriate applications in refrigeration
systems.
Classifying refrigerants is irrelevant to system performance.
Classifying refrigerants is only necessary for regulatory compliance.
Classifying refrigerants only affects their cost.
5. When moisture combines with refrigerants it could cause the formation of
.
strong base cation
highly corrosive compounds
diluted refrigerant
mildly corrosive compounds
concentrated refrigerant
6. What is the term for heat that results in a change in temperature without
changing the state of a substance?
Specific heat
Latent heat
Thermal energy
Sensible heat
7. In which component of a refrigeration system does the refrigerant undergo a
pressure change?
Expansion valve
Condenser
, Evaporator
Compressor
8. Describe the importance of refrigerant recovery in refrigeration systems.
Refrigerant recovery is only necessary when the system is being
replaced.
Refrigerant recovery is a process that increases system efficiency.
Refrigerant recovery is used to enhance the cooling capacity of the
system.
Refrigerant recovery is important to prevent environmental harm
and ensure safe handling of refrigerants.
9. The function of compressor is to
Pull the refrigerant gas through the system
Increase the pressure of the refrigerant
Discharge the refrigerant to the condenser
All of the above
10. Which of the following is an HCFC?
R-12
R-11
R-22
R-20
11. Which of the following has become the industry accepted replacement for
R22?
, R502
R134a
R410a
R409
12. In the modern refrigeration cycle, the compressor:
Transfers heat to the outdoor air.
Increases the pressure of the liquid refrigerant so that it will circulate
through the system.
Reduces the pressure of the liquid from the condenser to the
evaporator.
Pumps low-pressure, low-temperature vapor to high-pressure,
high-temperature vapor.
13. Describe the role of the evaporator and condenser in the refrigeration cycle.
The evaporator releases heat, while the condenser absorbs heat.
The evaporator absorbs heat and allows the refrigerant to
evaporate, while the condenser releases heat and allows the
refrigerant to condense.
The evaporator compresses the refrigerant, while the condenser
expands it.
The evaporator and condenser both absorb heat from the
environment.
14. Heat input that does not cause a temperature change, but does cause a
change of state is called
Vaporization.
Verified Answers | Latest Update | Graded A+
1. The refrigerant R-134a belongs to the following safety group:
A1
B1
A2
A3
2. If a refrigeration system is using R-134a and needs to be replaced with a
more environmentally friendly option, which refrigerant could be
considered?
R-22
R-1234yf
R-410A
R-404A
3. What is the primary role of the evaporator in a refrigeration system?
It compresses the refrigerant.
It releases heat to the environment.
It regulates the flow of refrigerant.
It absorbs heat from the environment.
4. Describe the significance of classifying refrigerants like R-500 in refrigeration
systems.
, Classifying refrigerants helps in understanding their properties,
safety measures, and appropriate applications in refrigeration
systems.
Classifying refrigerants is irrelevant to system performance.
Classifying refrigerants is only necessary for regulatory compliance.
Classifying refrigerants only affects their cost.
5. When moisture combines with refrigerants it could cause the formation of
.
strong base cation
highly corrosive compounds
diluted refrigerant
mildly corrosive compounds
concentrated refrigerant
6. What is the term for heat that results in a change in temperature without
changing the state of a substance?
Specific heat
Latent heat
Thermal energy
Sensible heat
7. In which component of a refrigeration system does the refrigerant undergo a
pressure change?
Expansion valve
Condenser
, Evaporator
Compressor
8. Describe the importance of refrigerant recovery in refrigeration systems.
Refrigerant recovery is only necessary when the system is being
replaced.
Refrigerant recovery is a process that increases system efficiency.
Refrigerant recovery is used to enhance the cooling capacity of the
system.
Refrigerant recovery is important to prevent environmental harm
and ensure safe handling of refrigerants.
9. The function of compressor is to
Pull the refrigerant gas through the system
Increase the pressure of the refrigerant
Discharge the refrigerant to the condenser
All of the above
10. Which of the following is an HCFC?
R-12
R-11
R-22
R-20
11. Which of the following has become the industry accepted replacement for
R22?
, R502
R134a
R410a
R409
12. In the modern refrigeration cycle, the compressor:
Transfers heat to the outdoor air.
Increases the pressure of the liquid refrigerant so that it will circulate
through the system.
Reduces the pressure of the liquid from the condenser to the
evaporator.
Pumps low-pressure, low-temperature vapor to high-pressure,
high-temperature vapor.
13. Describe the role of the evaporator and condenser in the refrigeration cycle.
The evaporator releases heat, while the condenser absorbs heat.
The evaporator absorbs heat and allows the refrigerant to
evaporate, while the condenser releases heat and allows the
refrigerant to condense.
The evaporator compresses the refrigerant, while the condenser
expands it.
The evaporator and condenser both absorb heat from the
environment.
14. Heat input that does not cause a temperature change, but does cause a
change of state is called
Vaporization.
