NJ BLUE SEAL REFRIGERATION Exam 3
Questions And Verified Answers 2025
Detailed Answers
Choose the statement below, which would prove false about
lithium bromide used in absorption systems?
It is non-corrosive
What is a sling psychrometer device used to measure?
Relative humidity
A system using an evaporative condenser operates most
efficiently under what conditions?
When the wet-bulb temperature of air is low
the discharge gas from the compressor is what, in a wet-
compression refrigeration system?
Saturated
If a refrigeration system were over charged with refrigerant,
what conditions would occur?
Decrease in capacity and increase in head pressure
If a cooling tower circulated 4,300 GPM of water, what is the
cooling capacity in tons?
1,433 tons
What condition would cause a system to not respond to an
expansion valve adjustment?
Oil in the evaporator
In an absorption system, the generator receives what
medium?
Strong liquor
Which would have the least effect on the capacity of a water
cooled condenser?
,The ambient air temperature
What is the volume occupied by a refrigerant under specified
conditions of pressure and temperature?
Specific volume
What should a cooling tower water PH be maintained at?
8
The absolute Celsius scale is referred to by which
temperature scale?
Kelvin temperature scale
Which devices control the high side float?
Condenser and receiver
In Fahrenheit, what is the equivalent of -15 degrees Celsius?
5 degrees Fahrenheit
If you had a flooded evaporator, which type of metering
device would you use?
Low side float
Choose the formula used to determine the number of cycles
of concentration for a cooling tower?
Cycles = Tower water chlorides/ make up water chlorides
What determines the low side pressure in a refrigeration
system?
The amount of load on the system
Which seal is not used in a refrigeration system?
Mechanical
Which water chemistry test is used to determine cooling
tower cycles of concentration?
Chlorides
Why is a rheostat used on a synchronous motor?
To vary the power factor to the load conditions
What would happen if you had a sudden drop in the
temperature in the cooling tower of a lithium bromide
absorption system?
, Crystallization in the system
What is the function of a heat exchanger in an absorption
system?
Allows the weak liquor to heat the strong liquor
Define the term "refrigerant reclaiming"
All of the above
Which phrase best describes the term "free air"?
Air at atmospheric conditions
How is the setting on a thermostatic expansion valve rated?
Degrees of superheat
Which statement describes the operation of a single acting
compressor?
The refrigeration gas is compressed on only one side of the piston
Which of the following would cause a noisy compressor?
Lack of oil
When the evaporator load increases, what happens to the
suction pressure of the system?
Flow increases while the pressure remains constant
Thermostatic expansion valves are rated in what units of
measurement?
Tons of refrigeration
If a cooling tower has a PH of 7.8 it is?
Slightly alkaline
Where would you find flash gas in an efficiently operating
system?
In the evaporator
The capacity of an evaporative condenser is determined by:
All of the above
The ratio between the actual pressures of the vapor to its
saturation pressure in the atmosphere is known as what?
Relative humidity
Questions And Verified Answers 2025
Detailed Answers
Choose the statement below, which would prove false about
lithium bromide used in absorption systems?
It is non-corrosive
What is a sling psychrometer device used to measure?
Relative humidity
A system using an evaporative condenser operates most
efficiently under what conditions?
When the wet-bulb temperature of air is low
the discharge gas from the compressor is what, in a wet-
compression refrigeration system?
Saturated
If a refrigeration system were over charged with refrigerant,
what conditions would occur?
Decrease in capacity and increase in head pressure
If a cooling tower circulated 4,300 GPM of water, what is the
cooling capacity in tons?
1,433 tons
What condition would cause a system to not respond to an
expansion valve adjustment?
Oil in the evaporator
In an absorption system, the generator receives what
medium?
Strong liquor
Which would have the least effect on the capacity of a water
cooled condenser?
,The ambient air temperature
What is the volume occupied by a refrigerant under specified
conditions of pressure and temperature?
Specific volume
What should a cooling tower water PH be maintained at?
8
The absolute Celsius scale is referred to by which
temperature scale?
Kelvin temperature scale
Which devices control the high side float?
Condenser and receiver
In Fahrenheit, what is the equivalent of -15 degrees Celsius?
5 degrees Fahrenheit
If you had a flooded evaporator, which type of metering
device would you use?
Low side float
Choose the formula used to determine the number of cycles
of concentration for a cooling tower?
Cycles = Tower water chlorides/ make up water chlorides
What determines the low side pressure in a refrigeration
system?
The amount of load on the system
Which seal is not used in a refrigeration system?
Mechanical
Which water chemistry test is used to determine cooling
tower cycles of concentration?
Chlorides
Why is a rheostat used on a synchronous motor?
To vary the power factor to the load conditions
What would happen if you had a sudden drop in the
temperature in the cooling tower of a lithium bromide
absorption system?
, Crystallization in the system
What is the function of a heat exchanger in an absorption
system?
Allows the weak liquor to heat the strong liquor
Define the term "refrigerant reclaiming"
All of the above
Which phrase best describes the term "free air"?
Air at atmospheric conditions
How is the setting on a thermostatic expansion valve rated?
Degrees of superheat
Which statement describes the operation of a single acting
compressor?
The refrigeration gas is compressed on only one side of the piston
Which of the following would cause a noisy compressor?
Lack of oil
When the evaporator load increases, what happens to the
suction pressure of the system?
Flow increases while the pressure remains constant
Thermostatic expansion valves are rated in what units of
measurement?
Tons of refrigeration
If a cooling tower has a PH of 7.8 it is?
Slightly alkaline
Where would you find flash gas in an efficiently operating
system?
In the evaporator
The capacity of an evaporative condenser is determined by:
All of the above
The ratio between the actual pressures of the vapor to its
saturation pressure in the atmosphere is known as what?
Relative humidity
