Refrigeration Operator Exam Questions
with Verified Answers
What determines leak tendency? - Answer- Molecular mass
The rate of flow of electrons along a wire is determined by - Answer- Cross sectional
area of the wire
Length of the wire
Resistance in the wire or device
Turns lights on and off from one location - Answer- Two way switch
The force of the atmosphere above us produces: - Answer- Atmospheric pressure
The higher the elevation the..... - Answer- less atmosphere is above us
Atmospheric pressure decreases with_________ - Answer- elevation
Atmospheric pressure at sea level - Answer- 101.3kPa
Pressures measured with gauges are classified as _______ - Answer- Gauge pressures
Absolute pressure = Gauge pressure + ___________ - Answer- Atmospheric pressure
Power is the _____ of doing work - Answer- Rate
The unit of joule per second is _______ - Answer- a Watt
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
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
with Verified Answers
What determines leak tendency? - Answer- Molecular mass
The rate of flow of electrons along a wire is determined by - Answer- Cross sectional
area of the wire
Length of the wire
Resistance in the wire or device
Turns lights on and off from one location - Answer- Two way switch
The force of the atmosphere above us produces: - Answer- Atmospheric pressure
The higher the elevation the..... - Answer- less atmosphere is above us
Atmospheric pressure decreases with_________ - Answer- elevation
Atmospheric pressure at sea level - Answer- 101.3kPa
Pressures measured with gauges are classified as _______ - Answer- Gauge pressures
Absolute pressure = Gauge pressure + ___________ - Answer- Atmospheric pressure
Power is the _____ of doing work - Answer- Rate
The unit of joule per second is _______ - Answer- a Watt
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
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
