Page | 1
FDNY Z51 RMO 2025| BRAND NEW
ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
GUARANTEED VALUE PACK| ACE YOUR
GRADES.
1. In order for for drink to become superheated and must be
heated in a section of the low side refrigerant line - correct
answer - Were no liquid Refrigerant is present
2. All liquid has been recovered from a system to be overhauled
the system - correct answer - Should not be opened until all
vapor has been recovered
3. What is the function of the turbine auxiliary oil pump - correct
answer - Establish oil pressure doing turbine start up
4. The ruptured disk for a low pressure centrifugal refrigeration
machine is normally located on the - correct answer -
Compressor suction
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5. What is the primary reason ribbed metal piping is used for
electrical wires connected to the refrigeration system shown
below - correct answer - It allows for flexibility and accounts for
vibrations
6. A multi cylinder reciprocating compressor uses cylinder
unloaders to regularly capacity what would not occur if some of
the unloaders fail to operate when needed - correct answer -
The chill water temperature will increase
7. Of the following centrifugal refrigeration machine his best
characterized by - correct answer - High volume low pressure
machine
8. Modern compresses usually sealed the rotating shaft as it exit
the compressor housing a Spring loaded seal made of - correct
answer - Metal or carbon
9. The British thermal unit BTU is a measurement of heat of
energy if 10 be to you a transfer to 10 pounds of water the
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water temperature increase will be closest to - correct answer -
1ﾟF
10. The Flash point of compressor lubricating oil - correct
answer - Should be higher than the compression temperature
11. The most common reason for refrigeration engineer to use a
psychrommeter is to measure - correct answer - Relatively
humidity level of the atmosphere
12. Under normal conditions the refrigerant enters the
Compressor as a - correct answer - Low pressure superheated
vapor and leaves as a high pressure of vapor
13. What is the function of the vacuum breaker in a steam
turbine - correct answer - To achieve a faster coast down cycle
14. An equalizer line on TXV is used for - correct answer -
Compensate for the pressure drop across the evaporator coil
FDNY Z51 RMO 2025| BRAND NEW
ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
GUARANTEED VALUE PACK| ACE YOUR
GRADES.
1. In order for for drink to become superheated and must be
heated in a section of the low side refrigerant line - correct
answer - Were no liquid Refrigerant is present
2. All liquid has been recovered from a system to be overhauled
the system - correct answer - Should not be opened until all
vapor has been recovered
3. What is the function of the turbine auxiliary oil pump - correct
answer - Establish oil pressure doing turbine start up
4. The ruptured disk for a low pressure centrifugal refrigeration
machine is normally located on the - correct answer -
Compressor suction
, Page | 2
5. What is the primary reason ribbed metal piping is used for
electrical wires connected to the refrigeration system shown
below - correct answer - It allows for flexibility and accounts for
vibrations
6. A multi cylinder reciprocating compressor uses cylinder
unloaders to regularly capacity what would not occur if some of
the unloaders fail to operate when needed - correct answer -
The chill water temperature will increase
7. Of the following centrifugal refrigeration machine his best
characterized by - correct answer - High volume low pressure
machine
8. Modern compresses usually sealed the rotating shaft as it exit
the compressor housing a Spring loaded seal made of - correct
answer - Metal or carbon
9. The British thermal unit BTU is a measurement of heat of
energy if 10 be to you a transfer to 10 pounds of water the
, Page | 3
water temperature increase will be closest to - correct answer -
1ﾟF
10. The Flash point of compressor lubricating oil - correct
answer - Should be higher than the compression temperature
11. The most common reason for refrigeration engineer to use a
psychrommeter is to measure - correct answer - Relatively
humidity level of the atmosphere
12. Under normal conditions the refrigerant enters the
Compressor as a - correct answer - Low pressure superheated
vapor and leaves as a high pressure of vapor
13. What is the function of the vacuum breaker in a steam
turbine - correct answer - To achieve a faster coast down cycle
14. An equalizer line on TXV is used for - correct answer -
Compensate for the pressure drop across the evaporator coil
