NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED ANSW
2025(GRADED A+) DETAILED ANSWERS!!
Study online at https://quizlet.com/_hlwc7i
1. On a single acting reciprocating compressor, It allows constant speed control and
what is the function of a dual control device? stops and starts
2. If a system were using an automatic expan- The evaporator
sion valve, where would the constant pres-
sure be maintained at?
3. What is the main advantage of a cascade Capable of reaching very low tempera-
refrigeration system? tures
4. A false statement about lithium bromide It is non-corrosive
used in absorption systems:
5. What is a sling psychrometer used to mea- Relative humidity
sure?
6. Discribe the discharge gas from the com- Saturated
pressor in a wet-compression refrigeration
system
7. If a cooling tower circulated 4,300 GPM of 4,300/3 = 1,433 tons
water, what is the cooling capacity in tons?
8. What condition would cause a system to not Oil in the evaporator
respond to an expansion valve adjustment?
9. What would have the least effect on the ca- The ambient air temperature
pacity of a water cooled condenser?
10. What is the volume occupied by a refrigerant Specific volume
under specified conditions of pressure and
temperature?
, NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED ANSW
2025(GRADED A+) DETAILED ANSWERS!!
Study online at https://quizlet.com/_hlwc7i
11. What should cooling tower water pH be 8
maintained at?
12. The absolute Celsius scale is referred to by Kelvin
which temperature scale?
13. Which devices control the high side float? Condenser and receiver
14. In Fahrenheit, what is the equivalent of -15 5 degrees F
degrees Celsius?
15. If you had a flooded evaporator, which type Low side float
of metering device would you use?
16. What is the formula used to determine the Cycles = Tower water chlorides / makeup
number of cycles of concentration for a cool- water chlorides
ing tower?
17. What determines the low side pressure in a The evaporator flow rate
refrigeration system?
18. What seal is not used on a refrigeration sys- Mechanical
tem?
19. What water chemistry test is used to deter- Chlorides
mine cooling tower cycles of concentration?
20. What would happen if you had a sudden Crystallization in the system
drop in the temperature in the cooling tower
of a lithium bromide absorption system?
21. Define the term "Refrigerant reclaiming" Chemically analyzing and distilling the
refrigerant; Reprocessing the refrigerant
, NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED ANSW
2025(GRADED A+) DETAILED ANSWERS!!
Study online at https://quizlet.com/_hlwc7i
into a new product that can be reused;
Selling reprocessed refrigerant as re-
claimed refrigerant
22. Describe the term "free air" Air at atmospheric conditions
23. How is the setting on a thermostic expansion Degrees of superheat
valve rated?
24. Describe the operation of a single acting The refrigerant gas is compressed on
compressor only one side of the piston
25. What would cause a noisy compressor? Lack of oil; dry or damaged seal; loose
drive coupling
26. Thermostatic expansion valves are rated in Tons of refrigeration
what units of measurement?
27. If a cooling tower has a pH of 7.8, it is: Slightly alkaline
28. Where would you find flash gas in an effi- In the evaporator
ciently operating system?
29. A cooling tower is circulating 2,850 GPM of 2,850/3 = 950 tons
water; what is the cooling capacity in tons?
30. What conditions can cause high discharge Refrigerant overcharge; an undersized
pressure in a system? condenser; insufficient cooling water to
the condenser
31. What would frost on the suction line of a Overcharged system
system using a high side floate indicate?
32. Convection
2025(GRADED A+) DETAILED ANSWERS!!
Study online at https://quizlet.com/_hlwc7i
1. On a single acting reciprocating compressor, It allows constant speed control and
what is the function of a dual control device? stops and starts
2. If a system were using an automatic expan- The evaporator
sion valve, where would the constant pres-
sure be maintained at?
3. What is the main advantage of a cascade Capable of reaching very low tempera-
refrigeration system? tures
4. A false statement about lithium bromide It is non-corrosive
used in absorption systems:
5. What is a sling psychrometer used to mea- Relative humidity
sure?
6. Discribe the discharge gas from the com- Saturated
pressor in a wet-compression refrigeration
system
7. If a cooling tower circulated 4,300 GPM of 4,300/3 = 1,433 tons
water, what is the cooling capacity in tons?
8. What condition would cause a system to not Oil in the evaporator
respond to an expansion valve adjustment?
9. What would have the least effect on the ca- The ambient air temperature
pacity of a water cooled condenser?
10. What is the volume occupied by a refrigerant Specific volume
under specified conditions of pressure and
temperature?
, NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED ANSW
2025(GRADED A+) DETAILED ANSWERS!!
Study online at https://quizlet.com/_hlwc7i
11. What should cooling tower water pH be 8
maintained at?
12. The absolute Celsius scale is referred to by Kelvin
which temperature scale?
13. Which devices control the high side float? Condenser and receiver
14. In Fahrenheit, what is the equivalent of -15 5 degrees F
degrees Celsius?
15. If you had a flooded evaporator, which type Low side float
of metering device would you use?
16. What is the formula used to determine the Cycles = Tower water chlorides / makeup
number of cycles of concentration for a cool- water chlorides
ing tower?
17. What determines the low side pressure in a The evaporator flow rate
refrigeration system?
18. What seal is not used on a refrigeration sys- Mechanical
tem?
19. What water chemistry test is used to deter- Chlorides
mine cooling tower cycles of concentration?
20. What would happen if you had a sudden Crystallization in the system
drop in the temperature in the cooling tower
of a lithium bromide absorption system?
21. Define the term "Refrigerant reclaiming" Chemically analyzing and distilling the
refrigerant; Reprocessing the refrigerant
, NJ BLUE SEAL REFRIGERATION EXAM QUESTIONS AND VERIFIED ANSW
2025(GRADED A+) DETAILED ANSWERS!!
Study online at https://quizlet.com/_hlwc7i
into a new product that can be reused;
Selling reprocessed refrigerant as re-
claimed refrigerant
22. Describe the term "free air" Air at atmospheric conditions
23. How is the setting on a thermostic expansion Degrees of superheat
valve rated?
24. Describe the operation of a single acting The refrigerant gas is compressed on
compressor only one side of the piston
25. What would cause a noisy compressor? Lack of oil; dry or damaged seal; loose
drive coupling
26. Thermostatic expansion valves are rated in Tons of refrigeration
what units of measurement?
27. If a cooling tower has a pH of 7.8, it is: Slightly alkaline
28. Where would you find flash gas in an effi- In the evaporator
ciently operating system?
29. A cooling tower is circulating 2,850 GPM of 2,850/3 = 950 tons
water; what is the cooling capacity in tons?
30. What conditions can cause high discharge Refrigerant overcharge; an undersized
pressure in a system? condenser; insufficient cooling water to
the condenser
31. What would frost on the suction line of a Overcharged system
system using a high side floate indicate?
32. Convection
