Saskatchewan Refrigeration Mechanic Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a refrigeration system?
a) To heat spaces
b) To compress air
c) To remove heat from a space
d) To increase humidity
The refrigeration system removes heat from a designated space to
maintain lower temperatures.
2. Which component of a refrigeration cycle absorbs heat from the
refrigerated space?
a) Condenser
b) Expansion valve
c) Evaporator
d) Compressor
The evaporator absorbs heat from the space, causing the
refrigerant to evaporate.
3. What type of refrigerant is commonly used in modern low-
temperature systems?
a) R-12
b) R-404A
c) Ammonia
, d) R-22
R-404A is widely used in commercial low-temperature
refrigeration due to safety and efficiency.
4. The function of a compressor in a refrigeration system is to:
a) Condense refrigerant
b) Expand refrigerant
c) Increase refrigerant pressure and temperature
d) Remove moisture
The compressor raises the refrigerant’s pressure and temperature,
enabling heat rejection in the condenser.
5. What is the role of the expansion device in a refrigeration system?
a) Heat the refrigerant
b) Lower the refrigerant pressure and temperature
c) Increase system pressure
d) Remove non-condensables
The expansion device reduces pressure, causing refrigerant to cool
and partially evaporate.
6. Which safety device prevents excessive pressure in a refrigeration
system?
a) Sight glass
b) High-pressure safety switch
c) Filter drier
d) Expansion valve
A high-pressure switch shuts down the system if pressure exceeds
safe limits.
7. What is the typical state of refrigerant entering the compressor?
a) High-pressure liquid
, b) Low-pressure vapor
c) High-pressure vapor
d) Low-pressure liquid
The compressor receives low-pressure vapor from the evaporator
to compress it.
8. In ammonia refrigeration, what color is typically used for liquid
ammonia piping?
a) Green
b) Blue
c) Yellow
d) Red
Yellow indicates ammonia in piping standards for identification
and safety.
9. What does a sight glass indicate in a refrigeration system?
a) Refrigerant temperature
b) Refrigerant flow and moisture content
c) Condenser pressure
d) Evaporator pressure
The sight glass allows visual inspection of refrigerant, including
liquid level and moisture indicators.
10. What is the most common cause of ice formation on the
evaporator coil?
a) Low humidity
b) High superheat
c) Restricted airflow
d) High condenser pressure
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a refrigeration system?
a) To heat spaces
b) To compress air
c) To remove heat from a space
d) To increase humidity
The refrigeration system removes heat from a designated space to
maintain lower temperatures.
2. Which component of a refrigeration cycle absorbs heat from the
refrigerated space?
a) Condenser
b) Expansion valve
c) Evaporator
d) Compressor
The evaporator absorbs heat from the space, causing the
refrigerant to evaporate.
3. What type of refrigerant is commonly used in modern low-
temperature systems?
a) R-12
b) R-404A
c) Ammonia
, d) R-22
R-404A is widely used in commercial low-temperature
refrigeration due to safety and efficiency.
4. The function of a compressor in a refrigeration system is to:
a) Condense refrigerant
b) Expand refrigerant
c) Increase refrigerant pressure and temperature
d) Remove moisture
The compressor raises the refrigerant’s pressure and temperature,
enabling heat rejection in the condenser.
5. What is the role of the expansion device in a refrigeration system?
a) Heat the refrigerant
b) Lower the refrigerant pressure and temperature
c) Increase system pressure
d) Remove non-condensables
The expansion device reduces pressure, causing refrigerant to cool
and partially evaporate.
6. Which safety device prevents excessive pressure in a refrigeration
system?
a) Sight glass
b) High-pressure safety switch
c) Filter drier
d) Expansion valve
A high-pressure switch shuts down the system if pressure exceeds
safe limits.
7. What is the typical state of refrigerant entering the compressor?
a) High-pressure liquid
, b) Low-pressure vapor
c) High-pressure vapor
d) Low-pressure liquid
The compressor receives low-pressure vapor from the evaporator
to compress it.
8. In ammonia refrigeration, what color is typically used for liquid
ammonia piping?
a) Green
b) Blue
c) Yellow
d) Red
Yellow indicates ammonia in piping standards for identification
and safety.
9. What does a sight glass indicate in a refrigeration system?
a) Refrigerant temperature
b) Refrigerant flow and moisture content
c) Condenser pressure
d) Evaporator pressure
The sight glass allows visual inspection of refrigerant, including
liquid level and moisture indicators.
10. What is the most common cause of ice formation on the
evaporator coil?
a) Low humidity
b) High superheat
c) Restricted airflow
d) High condenser pressure
