FDNY Z51 RMO EXAM LATEST 2026 UPDATED QUESTIONS AND
VERIFIED 100% SOLUTIONS (2026/2027) |A+ GRADED
|GUARANTEED PASS
A refrigerant engineer verifies that a chilled water pump is cavity to of the following the most
likely cause for this condition is - Answers -Water leaks through the mechanical seals
The only refrigerant/temperature chart available to a refrigeration engineer lists the
temperature In ﾟC if the chart indicates a Celsius temperature of 4ﾟ this is equivalent to -
Answers -39.2ﾟ
The use of oil in the refrigeration machine is to - Answers -Reduce wear and friction in the
compressor parts
Which of the following will connect to the Middle port on a gauge manifold - Answers -Vacuum
pump
There is a decrease in efficiency of a reciprocating compressor. The most likely is caused by -
Answers -Leaking suction valve
The suction and discharge valve of the reciprocating compressor are mounted as follows -
Answers -Discharge valve on top of the valve plate and suction valve below
1|Page
,A high side float is used to maintain - Answers -Constant level of refrigerant in the evaporator
Which of these compressors is not a positive type compressor displacement - Answers -
Centrifugal
When is emergency power not required according to code - Answers -Data centers
What is the most widely used regulation book by operating engineers - Answers -EPA
What type of refrigerant do you need FDNY approval for - Answers -Propane
Centrifugal pressure is determined by - Answers -Speed of motor
Liquid refrigerant that has passed through a metering device is at - Answers -Low pressure
saturated liquid
What is the advantage of a shell and tube condenser as oposed to a shell and coil condenser -
Answers -Better heat transfer
2|Page
, Where is the muffler located - Answers -Between the compressor and condenser
After recovering liquid refrigerant from a centrifugal chiller the next step shall be - Answers -
Recover vapor
How long must a fire alarm log book be kept - Answers -3 years
What is the minimum requirement of an engineer needs to log readings - Answers -Once per
shift
When entering phase 2 firemen service what statement is correct - Answers -The elevator
operator is the only person that can control the elevator
You are the only engineer on duty with the machine running a vice president tells you to shovel
snow what should you do - Answers -Do not leave the building
How often must you do emergency power testing - Answers -Monthly
What is the responsibility of AB29 certificate of fitness holder - Answers -Inspect the battery
system
3|Page
VERIFIED 100% SOLUTIONS (2026/2027) |A+ GRADED
|GUARANTEED PASS
A refrigerant engineer verifies that a chilled water pump is cavity to of the following the most
likely cause for this condition is - Answers -Water leaks through the mechanical seals
The only refrigerant/temperature chart available to a refrigeration engineer lists the
temperature In ﾟC if the chart indicates a Celsius temperature of 4ﾟ this is equivalent to -
Answers -39.2ﾟ
The use of oil in the refrigeration machine is to - Answers -Reduce wear and friction in the
compressor parts
Which of the following will connect to the Middle port on a gauge manifold - Answers -Vacuum
pump
There is a decrease in efficiency of a reciprocating compressor. The most likely is caused by -
Answers -Leaking suction valve
The suction and discharge valve of the reciprocating compressor are mounted as follows -
Answers -Discharge valve on top of the valve plate and suction valve below
1|Page
,A high side float is used to maintain - Answers -Constant level of refrigerant in the evaporator
Which of these compressors is not a positive type compressor displacement - Answers -
Centrifugal
When is emergency power not required according to code - Answers -Data centers
What is the most widely used regulation book by operating engineers - Answers -EPA
What type of refrigerant do you need FDNY approval for - Answers -Propane
Centrifugal pressure is determined by - Answers -Speed of motor
Liquid refrigerant that has passed through a metering device is at - Answers -Low pressure
saturated liquid
What is the advantage of a shell and tube condenser as oposed to a shell and coil condenser -
Answers -Better heat transfer
2|Page
, Where is the muffler located - Answers -Between the compressor and condenser
After recovering liquid refrigerant from a centrifugal chiller the next step shall be - Answers -
Recover vapor
How long must a fire alarm log book be kept - Answers -3 years
What is the minimum requirement of an engineer needs to log readings - Answers -Once per
shift
When entering phase 2 firemen service what statement is correct - Answers -The elevator
operator is the only person that can control the elevator
You are the only engineer on duty with the machine running a vice president tells you to shovel
snow what should you do - Answers -Do not leave the building
How often must you do emergency power testing - Answers -Monthly
What is the responsibility of AB29 certificate of fitness holder - Answers -Inspect the battery
system
3|Page
