NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED
ANSWERS 2025(GRADED A+) DETAILED ANSWERS!!
On a single acting reciprocating compressor, what is the function of a dual
control device? - (ANSWERS)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? - (ANSWERS)The evaporator
What is the main advantage of a cascade refrigeration system? -
(ANSWERS)Capable of reaching very low temperatures
A false statement about lithium bromide used in absorption systems: -
(ANSWERS)It is non-corrosive
What is a sling psychrometer used to measure? - (ANSWERS)Relative
humidity
Discribe the discharge gas from the compressor in a wet-compression
refrigeration system - (ANSWERS)Saturated
If a cooling tower circulated 4,300 GPM of water, what is the cooling
,NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED
ANSWERS 2025(GRADED A+) DETAILED ANSWERS!!
capacity in tons? - (ANSWERS)4,300/3 = 1,433 tons
What condition would cause a system to not respond to an expansion valve
adjustment? - (ANSWERS)Oil in the evaporator
What would have the least effect on the capacity of a water cooled
condenser? - (ANSWERS)The ambient air temperature
What is the volume occupied by a refrigerant under specified conditions of
pressure and temperature? - (ANSWERS)Specific volume
What should cooling tower water ph be maintained at? - (ANSWERS)8
The absolute Celsius scale is referred to by which temperature scale? -
(ANSWERS)Kelvin
Which devices control the high side float? - (ANSWERS)Condenser and
receiver
,NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED
ANSWERS 2025(GRADED A+) DETAILED ANSWERS!!
In Fahrenheit, what is the equivalent of -15 degrees Celsius? -
(ANSWERS)5 degrees F
If you had a flooded evaporator, which type of metering device would you
use? - (ANSWERS)Low side float
What is the formula used to determine the number of cycles of
concentration for a cooling tower? - (ANSWERS)Cycles = Tower water
chlorides / makeup water chlorides
What determines the low side pressure in a refrigeration system? -
(ANSWERS)The evaporator flow rate
What seal is not used on a refrigeration system? - (ANSWERS)Mechanical
What water chemistry test is used to determine cooling tower cycles of
concentration? - (ANSWERS)Chlorides
What would happen if you had a sudden drop in the temperature in the
cooling tower of a lithium bromide absorption system? -
, NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED
ANSWERS 2025(GRADED A+) DETAILED ANSWERS!!
(ANSWERS)Crystallization in the system
Define the term "Refrigerant reclaiming" - (ANSWERS)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" - (ANSWERS)Air at atmospheric conditions
How is the setting on a thermostic expansion valve rated? -
(ANSWERS)Degrees of superheat
Describe the operation of a single acting compressor - (ANSWERS)The
refrigerant gas is compressed on only one side of the piston
What would cause a noisy compressor? - (ANSWERS)Lack of oil; dry or
damaged seal; loose drive coupling
Thermostatic expansion valves are rated in what units of measurement? -
(ANSWERS)Tons of refrigeration
ANSWERS 2025(GRADED A+) DETAILED ANSWERS!!
On a single acting reciprocating compressor, what is the function of a dual
control device? - (ANSWERS)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? - (ANSWERS)The evaporator
What is the main advantage of a cascade refrigeration system? -
(ANSWERS)Capable of reaching very low temperatures
A false statement about lithium bromide used in absorption systems: -
(ANSWERS)It is non-corrosive
What is a sling psychrometer used to measure? - (ANSWERS)Relative
humidity
Discribe the discharge gas from the compressor in a wet-compression
refrigeration system - (ANSWERS)Saturated
If a cooling tower circulated 4,300 GPM of water, what is the cooling
,NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED
ANSWERS 2025(GRADED A+) DETAILED ANSWERS!!
capacity in tons? - (ANSWERS)4,300/3 = 1,433 tons
What condition would cause a system to not respond to an expansion valve
adjustment? - (ANSWERS)Oil in the evaporator
What would have the least effect on the capacity of a water cooled
condenser? - (ANSWERS)The ambient air temperature
What is the volume occupied by a refrigerant under specified conditions of
pressure and temperature? - (ANSWERS)Specific volume
What should cooling tower water ph be maintained at? - (ANSWERS)8
The absolute Celsius scale is referred to by which temperature scale? -
(ANSWERS)Kelvin
Which devices control the high side float? - (ANSWERS)Condenser and
receiver
,NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED
ANSWERS 2025(GRADED A+) DETAILED ANSWERS!!
In Fahrenheit, what is the equivalent of -15 degrees Celsius? -
(ANSWERS)5 degrees F
If you had a flooded evaporator, which type of metering device would you
use? - (ANSWERS)Low side float
What is the formula used to determine the number of cycles of
concentration for a cooling tower? - (ANSWERS)Cycles = Tower water
chlorides / makeup water chlorides
What determines the low side pressure in a refrigeration system? -
(ANSWERS)The evaporator flow rate
What seal is not used on a refrigeration system? - (ANSWERS)Mechanical
What water chemistry test is used to determine cooling tower cycles of
concentration? - (ANSWERS)Chlorides
What would happen if you had a sudden drop in the temperature in the
cooling tower of a lithium bromide absorption system? -
, NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED
ANSWERS 2025(GRADED A+) DETAILED ANSWERS!!
(ANSWERS)Crystallization in the system
Define the term "Refrigerant reclaiming" - (ANSWERS)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" - (ANSWERS)Air at atmospheric conditions
How is the setting on a thermostic expansion valve rated? -
(ANSWERS)Degrees of superheat
Describe the operation of a single acting compressor - (ANSWERS)The
refrigerant gas is compressed on only one side of the piston
What would cause a noisy compressor? - (ANSWERS)Lack of oil; dry or
damaged seal; loose drive coupling
Thermostatic expansion valves are rated in what units of measurement? -
(ANSWERS)Tons of refrigeration
