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Refrigeration Operator Final Exam Review
Questions with Answers (100% Correct
Answers)
Unit of work in the SI system Answer: Joule
One watt is equal to Answer: Joule/second
Unit of Power in the SI system Answer: Watt
One kilopascal is equal to Answer: 1 kN/m²
Code for safe design of boilers and pressure vessels Answer: CSA B51
Code for safe design of refrigeration and air conditioning systems Answer: CSA
B-52
Units of measurement for specific humidity Answer: Kg/kg (lb/lb) of air
pneumatic humidistats Answer: Human hair element, membrane element, bi-
wood element
By keeping the temperature of spray water of an air conditioning system below
the dewpoint of the incoming air, the air is Answer: Air is dehumidified
Control of outside air intake in air conditioning Answer: A fixed quantity of
outdoor air is admitted by a two-position damper when the fan is in operation
System capable of heating, cooling, humidification, dehumidification, and
cleaning of air Answer: Unitary systems or air washers
Percentage of moisture in air compared to maximum capacity Answer: Relative
humidity
Relative humidity of air Answer: Percentage of moisture in the air compared to
the maximum amount of moisture the air is capable of holding at the stated
temperature
, 2
Device for measuring relative humidity Answer: Chronometer
Dewpoint Answer: Temperature at which water vapour will start to condense
out of the air
Relative humidity is Answer: The ratio of water vapor in the air compared to
the total amount of water vapor at the air could contain at any given
temperature
Air is approximately______ composition by volume Answer: 21% 02 and 79%
N2
The most efficient method of condenser cooling is Answer: water cooled
The function of the condenser in refrigeration compression system is Answer:
To cool the hot compressed refrigerant vapor until it condenses to a liquid
The two types of evaporators dry and flooded principally differ in what respect
Answer: The size of the evaporator and the method of refrigeration circulation
An evaporator that contains only a small amount of liquid refrigerant and any
time is what type of evaporator Answer: A dry
The vent on the packing box of a pneumonia compressor is led to the
compressor Answer: Suction
Ammonia systems are not used for air-conditioning purposes and large
commercial buildings because Answer: They are too toxic
which of the following are not found on the low side of the pneumonia system?
A. Evaporator.
B. Generator.
C. Abs
D. Chilled water. Answer: B. Generator.
Refrigeration Operator Final Exam Review
Questions with Answers (100% Correct
Answers)
Unit of work in the SI system Answer: Joule
One watt is equal to Answer: Joule/second
Unit of Power in the SI system Answer: Watt
One kilopascal is equal to Answer: 1 kN/m²
Code for safe design of boilers and pressure vessels Answer: CSA B51
Code for safe design of refrigeration and air conditioning systems Answer: CSA
B-52
Units of measurement for specific humidity Answer: Kg/kg (lb/lb) of air
pneumatic humidistats Answer: Human hair element, membrane element, bi-
wood element
By keeping the temperature of spray water of an air conditioning system below
the dewpoint of the incoming air, the air is Answer: Air is dehumidified
Control of outside air intake in air conditioning Answer: A fixed quantity of
outdoor air is admitted by a two-position damper when the fan is in operation
System capable of heating, cooling, humidification, dehumidification, and
cleaning of air Answer: Unitary systems or air washers
Percentage of moisture in air compared to maximum capacity Answer: Relative
humidity
Relative humidity of air Answer: Percentage of moisture in the air compared to
the maximum amount of moisture the air is capable of holding at the stated
temperature
, 2
Device for measuring relative humidity Answer: Chronometer
Dewpoint Answer: Temperature at which water vapour will start to condense
out of the air
Relative humidity is Answer: The ratio of water vapor in the air compared to
the total amount of water vapor at the air could contain at any given
temperature
Air is approximately______ composition by volume Answer: 21% 02 and 79%
N2
The most efficient method of condenser cooling is Answer: water cooled
The function of the condenser in refrigeration compression system is Answer:
To cool the hot compressed refrigerant vapor until it condenses to a liquid
The two types of evaporators dry and flooded principally differ in what respect
Answer: The size of the evaporator and the method of refrigeration circulation
An evaporator that contains only a small amount of liquid refrigerant and any
time is what type of evaporator Answer: A dry
The vent on the packing box of a pneumonia compressor is led to the
compressor Answer: Suction
Ammonia systems are not used for air-conditioning purposes and large
commercial buildings because Answer: They are too toxic
which of the following are not found on the low side of the pneumonia system?
A. Evaporator.
B. Generator.
C. Abs
D. Chilled water. Answer: B. Generator.
