1
Refrigeration Operator Questions with
Answers (100% Correct Answers)
Provides the safe design, construction, and installation of boilers and pressure
vessels Answer: B51 Code
The code that provides for the safe design, construction, installation, operation,
inspection, testing, and repair of refrigeration and air conditioning equipment
and systems Answer: B52 Code
In refrigeration systems, heat is _______ from the substance to be cooled
Answer: Extracted
If atmospheric pressure is stated at 101.3 kPa, this is the same as Answer:
Absolute Pressure
A substance at its saturation point is Answer: At its boiling point
Viscosity Answer: The resistance to flow of a liquid
Ice arenas use a/an ______ refrigeration system Answer: Indirect
Latent Heat of Fusion Answer: The amount of heat required to change a liquid
to a solid
Ammonia classification Answer: B2
Critically charge system Answer: A refrigeration system where the entire
charge can be contained in the evaporator
Heat is a form of energy and may be transferred from one body to another by
virtue of a difference in Answer: temperature
A Refrigeration Operator certificate entiles the holder to be Answer: A
Refrigeration Operator and a person in charge of any type and size refrigeration
plant
,2
A refrigeration machinery room with specific restrictions is Answer: A Class T
machinery room
High Side Answer: Those portions of a refrigeration system that are subject to
condenser pressure
Indirect System Answer: A refrigeration system that uses secondary coolant to
transfer heat
Refrigerants in group A3 compared to group A1 Answer: Are more flammable
For a refrigeration plant containing more than 45kgs (100lbs) of refrigerant,
what is the minimum size of letters used for required signs? Answer: 13mm
The CSA-B52 does not apply to ______ Answer: Air
Absolute pressure when the gauge shows 350kPa Answer: 451kPa (350kPa
gauge pressure + 101.3 atmospheric pressure)
The valve best suited for isolating flow Answer: Gate valve
The valve best suited for throttling or regulating flow Answer: Globe valve
Between a gate and globe valve, which one has he lowest pressure drop as fluid
flows through it? Answer: Gate
The valve that is designed to for high temperature and pressures and range in
size from 1"-152" in diameter Answer: Butterfly Valve
The valve that is best suited to handle slurries and fluids with a high solid
content Answer: Ball Valve
If 2 or 3 boilers are connected to a common supply and return header, what
would the type of stop valve be? Answer: Non-pressure return valve
The items on a valve that require the closest examination Answer: Seat and
disc
The basic unit of all energy Answer: Joule
, 3
1 kilojoule equals Answer: 1000 joules
What is the available size range for unprotected, soft, annealed copper tubing
used for a refrigerant Answer: 6-35mm
The part of the refrigeration system designed to liquify refrigerant vapour
Answer: The condenser
How much experience must you have in a refrigerant plant in order to qualify
for the IFO qualification? Answer: 1 month
Heat transfer can occur by: Answer: Conduction, convection, radiation
The boiling point of water can be raised by: Answer: Increasing the pressure
above atmospheric pressure
Refrigeration can be defined as the thermodynamic process of lowering the
temperature of a substance below the temperature of its surroundings AND
Answer: maintaining this substance at the lower temperature
A closed refrigerant system provides for the return of ________ Answer:
Refrigerant
The refrigerant vapour must be returned to the _______ state Answer: liquid
Heat flows from ______ to _______ Answer: Hot to cold
The vapour can be condensed at a higher temperature as long as the pressure is
Answer: High enough
A compressor provides _____ pressure in the evaporator Answer: Low
A compressor provides ______ pressure discharge Answer: High
The capacity of the refrigeration system is: Answer: The rate at which it will
dissipate heat
A tonne of refrigeration - the equivalent of heat needed to melt 1 tonne of ice at
a temperature of 0 degrees celsius in ________ Answer: 24 hours
Refrigeration Operator Questions with
Answers (100% Correct Answers)
Provides the safe design, construction, and installation of boilers and pressure
vessels Answer: B51 Code
The code that provides for the safe design, construction, installation, operation,
inspection, testing, and repair of refrigeration and air conditioning equipment
and systems Answer: B52 Code
In refrigeration systems, heat is _______ from the substance to be cooled
Answer: Extracted
If atmospheric pressure is stated at 101.3 kPa, this is the same as Answer:
Absolute Pressure
A substance at its saturation point is Answer: At its boiling point
Viscosity Answer: The resistance to flow of a liquid
Ice arenas use a/an ______ refrigeration system Answer: Indirect
Latent Heat of Fusion Answer: The amount of heat required to change a liquid
to a solid
Ammonia classification Answer: B2
Critically charge system Answer: A refrigeration system where the entire
charge can be contained in the evaporator
Heat is a form of energy and may be transferred from one body to another by
virtue of a difference in Answer: temperature
A Refrigeration Operator certificate entiles the holder to be Answer: A
Refrigeration Operator and a person in charge of any type and size refrigeration
plant
,2
A refrigeration machinery room with specific restrictions is Answer: A Class T
machinery room
High Side Answer: Those portions of a refrigeration system that are subject to
condenser pressure
Indirect System Answer: A refrigeration system that uses secondary coolant to
transfer heat
Refrigerants in group A3 compared to group A1 Answer: Are more flammable
For a refrigeration plant containing more than 45kgs (100lbs) of refrigerant,
what is the minimum size of letters used for required signs? Answer: 13mm
The CSA-B52 does not apply to ______ Answer: Air
Absolute pressure when the gauge shows 350kPa Answer: 451kPa (350kPa
gauge pressure + 101.3 atmospheric pressure)
The valve best suited for isolating flow Answer: Gate valve
The valve best suited for throttling or regulating flow Answer: Globe valve
Between a gate and globe valve, which one has he lowest pressure drop as fluid
flows through it? Answer: Gate
The valve that is designed to for high temperature and pressures and range in
size from 1"-152" in diameter Answer: Butterfly Valve
The valve that is best suited to handle slurries and fluids with a high solid
content Answer: Ball Valve
If 2 or 3 boilers are connected to a common supply and return header, what
would the type of stop valve be? Answer: Non-pressure return valve
The items on a valve that require the closest examination Answer: Seat and
disc
The basic unit of all energy Answer: Joule
, 3
1 kilojoule equals Answer: 1000 joules
What is the available size range for unprotected, soft, annealed copper tubing
used for a refrigerant Answer: 6-35mm
The part of the refrigeration system designed to liquify refrigerant vapour
Answer: The condenser
How much experience must you have in a refrigerant plant in order to qualify
for the IFO qualification? Answer: 1 month
Heat transfer can occur by: Answer: Conduction, convection, radiation
The boiling point of water can be raised by: Answer: Increasing the pressure
above atmospheric pressure
Refrigeration can be defined as the thermodynamic process of lowering the
temperature of a substance below the temperature of its surroundings AND
Answer: maintaining this substance at the lower temperature
A closed refrigerant system provides for the return of ________ Answer:
Refrigerant
The refrigerant vapour must be returned to the _______ state Answer: liquid
Heat flows from ______ to _______ Answer: Hot to cold
The vapour can be condensed at a higher temperature as long as the pressure is
Answer: High enough
A compressor provides _____ pressure in the evaporator Answer: Low
A compressor provides ______ pressure discharge Answer: High
The capacity of the refrigeration system is: Answer: The rate at which it will
dissipate heat
A tonne of refrigeration - the equivalent of heat needed to melt 1 tonne of ice at
a temperature of 0 degrees celsius in ________ Answer: 24 hours
