Seal: NJ- Blue Seal Refrigeration Final
Exam with All Correct Answers 2026-
2027 Updated.
On a single acting reciprocating compressor, what is the function of a dual control device? -
Answer It allows constant speed control and stops and starts
If a system were using an automatic expansion valve, where would the constant pressure be
maintained at? - Answer The evaporator
What is the main advantage of a cascade refrigeration system? - Answer Capable of reaching
very low temperatures
A false statement about lithium bromide used in absorption systems: - Answer It is non-
corrosive
What is a sling psychrometer used to measure? - Answer Relative humidity
Discribe the discharge gas from the compressor in a wet-compression refrigeration system -
Answer Saturated
If a cooling tower circulated 4,300 GPM of water, what is the cooling capacity in tons? - Answer
4,300/3 = 1,433 tons
What condition would cause a system to not respond to an expansion valve adjustment? -
Answer Oil in the evaporator
What would have the least effect on the capacity of a water cooled condenser? - Answer The
ambient air temperature
What is the volume occupied by a refrigerant under specified conditions of pressure and
temperature? - Answer Specific volume
What should cooling tower water pH be maintained at? - Answer 8
The absolute Celsius scale is referred to by which temperature scale? - Answer Kelvin
, Which devices control the high side float? - Answer Condenser and receiver
In Fahrenheit, what is the equivalent of -15 degrees Celsius? - Answer 5 degrees F
If you had a flooded evaporator, which type of metering device would you use? - Answer Low
side float
What is the formula used to determine the number of cycles of concentration for a cooling
tower? - Answer Cycles = Tower water chlorides / makeup water chlorides
What determines the low side pressure in a refrigeration system? - Answer The evaporator
flow rate
What seal is not used on a refrigeration system? - Answer Mechanical
What water chemistry test is used to determine cooling tower cycles of concentration? - Answer
Chlorides
What would happen if you had a sudden drop in the temperature in the cooling tower of a
lithium bromide absorption system? - Answer Crystallization in the system
Define the term "Refrigerant reclaiming" - Answer Chemically analyzing and distilling the
refrigerant; Reprocessing the refrigerant into a new product that can be reused; Selling
reprocessed refrigerant as reclaimed refrigerant
Describe the term "free air" - Answer Air at atmospheric conditions
How is the setting on a thermostic expansion valve rated? - Answer Degrees of superheat
Describe the operation of a single acting compressor - Answer The refrigerant gas is
compressed on only one side of the piston
What would cause a noisy compressor? - Answer Lack of oil; dry or damaged seal; loose drive
coupling
Thermostatic expansion valves are rated in what units of measurement? - Answer Tons of
refrigeration
Exam with All Correct Answers 2026-
2027 Updated.
On a single acting reciprocating compressor, what is the function of a dual control device? -
Answer It allows constant speed control and stops and starts
If a system were using an automatic expansion valve, where would the constant pressure be
maintained at? - Answer The evaporator
What is the main advantage of a cascade refrigeration system? - Answer Capable of reaching
very low temperatures
A false statement about lithium bromide used in absorption systems: - Answer It is non-
corrosive
What is a sling psychrometer used to measure? - Answer Relative humidity
Discribe the discharge gas from the compressor in a wet-compression refrigeration system -
Answer Saturated
If a cooling tower circulated 4,300 GPM of water, what is the cooling capacity in tons? - Answer
4,300/3 = 1,433 tons
What condition would cause a system to not respond to an expansion valve adjustment? -
Answer Oil in the evaporator
What would have the least effect on the capacity of a water cooled condenser? - Answer The
ambient air temperature
What is the volume occupied by a refrigerant under specified conditions of pressure and
temperature? - Answer Specific volume
What should cooling tower water pH be maintained at? - Answer 8
The absolute Celsius scale is referred to by which temperature scale? - Answer Kelvin
, Which devices control the high side float? - Answer Condenser and receiver
In Fahrenheit, what is the equivalent of -15 degrees Celsius? - Answer 5 degrees F
If you had a flooded evaporator, which type of metering device would you use? - Answer Low
side float
What is the formula used to determine the number of cycles of concentration for a cooling
tower? - Answer Cycles = Tower water chlorides / makeup water chlorides
What determines the low side pressure in a refrigeration system? - Answer The evaporator
flow rate
What seal is not used on a refrigeration system? - Answer Mechanical
What water chemistry test is used to determine cooling tower cycles of concentration? - Answer
Chlorides
What would happen if you had a sudden drop in the temperature in the cooling tower of a
lithium bromide absorption system? - Answer Crystallization in the system
Define the term "Refrigerant reclaiming" - Answer Chemically analyzing and distilling the
refrigerant; Reprocessing the refrigerant into a new product that can be reused; Selling
reprocessed refrigerant as reclaimed refrigerant
Describe the term "free air" - Answer Air at atmospheric conditions
How is the setting on a thermostic expansion valve rated? - Answer Degrees of superheat
Describe the operation of a single acting compressor - Answer The refrigerant gas is
compressed on only one side of the piston
What would cause a noisy compressor? - Answer Lack of oil; dry or damaged seal; loose drive
coupling
Thermostatic expansion valves are rated in what units of measurement? - Answer Tons of
refrigeration
