NJ Blue Seal Refrigeration EXAM fully
solved & updated (latest version verified
for accuracy) (Questions + Answers)
Solved 100% Correct!!|| LATEST UPDATE
2026
On a single acting reciprocating compressor, what is the function of a dual control
device? -CORRECTANSWER It allows constant speed control and automatic start and
stops
If a system were using an automatic expansion valve, what would the constant pressure
be maintained at? -CORRECTANSWER The evaporator
What is the main advantage of a cascade refrigeration system? -CORRECTANSWER
Capable of reaching very low temperature
Choose the statement below, which would prove false about lithium bromide used in
absorption system. -CORRECTANSWER It is non-corrosive
What is a sling psychrometer device used to measure? -CORRECTANSWER Relative
humidity
,A system using an evaporative condenser operates most efficiently under what
conditions? -CORRECTANSWER When the wet-bulb temperature of air is low
The discharge gas from the compressor is what, in a wet-compression refrigeration
system? -CORRECTANSWER Saturated
If a refrigeration system were over charged with refrigerant, what conditions would
occur? -CORRECTANSWER 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? -
CORRECTANSWER 1,433 tons
What condition would cause a system to not respond to an expansion valve
adjustment? -CORRECTANSWER Oil in the evaporator
In an absorption system, the generator receives what medium? -CORRECTANSWER
Strong liquor
Which would have the lease effect on the capacity of a water-cooled condenser? -
CORRECTANSWER The ambient air temperature
What is the volume occupied by a refrigerant under specified conditions of pressure and
temperature? -CORRECTANSWER Specific volume
,What should a cooling tower water pH be maintained at? -CORRECTANSWER 8
The absolute Celsius scale is referred to by which temperature scale? -
CORRECTANSWER Kelvin
Which devices control the high side float? -CORRECTANSWER Condenser and
receiver
In Fahrenheit, what is the equivalent of -15 degrees Celsius? -CORRECTANSWER 5
degrees F
If you had a flooded evaporator, which type of metering device would you use? -
CORRECTANSWER Low side float
Choose the formula used to determine the number of cycles of concentration for a
cooling tower? -CORRECTANSWER Cycles = Tower water chlorides / Makeup water
chlorides
What determines the low side pressure in a refrigeration system? -CORRECTANSWER
The amount if load on the system
Which seal is not used on a refrigeration system? -CORRECTANSWER Mechanical
, Which water chemistry test is used to determine cooling tower cycles of concentration?
-CORRECTANSWER Chlorides
Why is a rheostat used on a synchronous motor? -CORRECTANSWER 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? -CORRECTANSWER Crystallization in the
system
What is the function of a heat exchanger in an absorption system? -
CORRECTANSWER Allows the weak liquor to heat the strong liquor
Define the term "refrigerant reclaiming" -CORRECTANSWER Selling reprocessed
refrigerant as "reclaimed refrigerant" ; Reprocessing the refrigerant into a new product
that can be reused ; Chemically analyzing and distilling the refrigerant ; All of the above
Which phrase best describes the term "free air"? -CORRECTANSWER Air at
atmospheric conditions
How is the setting on a thermostatic expansion valve rated? -CORRECTANSWER
Degrees of superheat
solved & updated (latest version verified
for accuracy) (Questions + Answers)
Solved 100% Correct!!|| LATEST UPDATE
2026
On a single acting reciprocating compressor, what is the function of a dual control
device? -CORRECTANSWER It allows constant speed control and automatic start and
stops
If a system were using an automatic expansion valve, what would the constant pressure
be maintained at? -CORRECTANSWER The evaporator
What is the main advantage of a cascade refrigeration system? -CORRECTANSWER
Capable of reaching very low temperature
Choose the statement below, which would prove false about lithium bromide used in
absorption system. -CORRECTANSWER It is non-corrosive
What is a sling psychrometer device used to measure? -CORRECTANSWER Relative
humidity
,A system using an evaporative condenser operates most efficiently under what
conditions? -CORRECTANSWER When the wet-bulb temperature of air is low
The discharge gas from the compressor is what, in a wet-compression refrigeration
system? -CORRECTANSWER Saturated
If a refrigeration system were over charged with refrigerant, what conditions would
occur? -CORRECTANSWER 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? -
CORRECTANSWER 1,433 tons
What condition would cause a system to not respond to an expansion valve
adjustment? -CORRECTANSWER Oil in the evaporator
In an absorption system, the generator receives what medium? -CORRECTANSWER
Strong liquor
Which would have the lease effect on the capacity of a water-cooled condenser? -
CORRECTANSWER The ambient air temperature
What is the volume occupied by a refrigerant under specified conditions of pressure and
temperature? -CORRECTANSWER Specific volume
,What should a cooling tower water pH be maintained at? -CORRECTANSWER 8
The absolute Celsius scale is referred to by which temperature scale? -
CORRECTANSWER Kelvin
Which devices control the high side float? -CORRECTANSWER Condenser and
receiver
In Fahrenheit, what is the equivalent of -15 degrees Celsius? -CORRECTANSWER 5
degrees F
If you had a flooded evaporator, which type of metering device would you use? -
CORRECTANSWER Low side float
Choose the formula used to determine the number of cycles of concentration for a
cooling tower? -CORRECTANSWER Cycles = Tower water chlorides / Makeup water
chlorides
What determines the low side pressure in a refrigeration system? -CORRECTANSWER
The amount if load on the system
Which seal is not used on a refrigeration system? -CORRECTANSWER Mechanical
, Which water chemistry test is used to determine cooling tower cycles of concentration?
-CORRECTANSWER Chlorides
Why is a rheostat used on a synchronous motor? -CORRECTANSWER 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? -CORRECTANSWER Crystallization in the
system
What is the function of a heat exchanger in an absorption system? -
CORRECTANSWER Allows the weak liquor to heat the strong liquor
Define the term "refrigerant reclaiming" -CORRECTANSWER Selling reprocessed
refrigerant as "reclaimed refrigerant" ; Reprocessing the refrigerant into a new product
that can be reused ; Chemically analyzing and distilling the refrigerant ; All of the above
Which phrase best describes the term "free air"? -CORRECTANSWER Air at
atmospheric conditions
How is the setting on a thermostatic expansion valve rated? -CORRECTANSWER
Degrees of superheat
