FDNY Z51 RMO CORRECT FINAL EXAMS QUESTIONS
AND ANSWERS RATED A+
✔✔The suction and discharge valve of the reciprocating compressor are mounted as
follows - ✔✔Discharge valve on top of the valve plate and suction valve below
✔✔A high side float is used to maintain - ✔✔Constant level of refrigerant in the
evaporator
✔✔Which of these compressors is not a positive type compressor displacement -
✔✔Centrifugal
✔✔When is emergency power not required according to code - ✔✔Data centers
✔✔What is the most widely used regulation book by operating engineers - ✔✔EPA
✔✔What type of refrigerant do you need FDNY approval for - ✔✔Propane
✔✔Centrifugal pressure is determined by - ✔✔Speed of motor
✔✔Liquid refrigerant that has passed through a metering device is at - ✔✔Low pressure
saturated liquid
✔✔What is the advantage of a shell and tube condenser as oposed to a shell and coil
condenser - ✔✔Better heat transfer
✔✔Where is the muffler located - ✔✔Between the compressor and condenser
✔✔After recovering liquid refrigerant from a centrifugal chiller the next step shall be -
✔✔Recover vapor
, ✔✔How long must a fire alarm log book be kept - ✔✔3 years
✔✔What is the minimum requirement of an engineer needs to log readings - ✔✔Once
per shift
✔✔When entering phase 2 firemen service what statement is correct - ✔✔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 - ✔✔Do not leave the building
✔✔How often must you do emergency power testing - ✔✔Monthly
✔✔What is the responsibility of AB29 certificate of fitness holder - ✔✔Inspect the
battery system
✔✔An engineer observes a gauge to read saturation pressure of refrigerant if chilled
water circulated as the cooling medium this reading best be used to estimate the -
✔✔Temperature of the chilled water being pumped to the spaces being cooled
✔✔Regardless of the ASHRAE refrigeration classification in use in the event of a
refrigerant escape the engineer should be aware of - ✔✔asphyxiation
✔✔When is a chemical fire extinguisher and system needed - ✔✔Where water is not
sufficient
✔✔What type of refrigerants found inside the machines gages - ✔✔Same type as the
refrigerant inside the machine
✔✔Fireproof decorations in buildings are used for - ✔✔They don't catch fire in an
emergency
✔✔Water regulating valves are used for - ✔✔Maintain condenser pressure To a pre
determined level
✔✔How long does it take to warm up a steam turbine - ✔✔10 to 15 minutes
✔✔Why is a pressure relief out better than a fusible plugs - ✔✔Minimize refrigerant los
✔✔You are performing hot work near a sprinkler head what can you do to prevent the
fire alarm system from going off - ✔✔Put a non combustible barrier to protect the
sprinkler
AND ANSWERS RATED A+
✔✔The suction and discharge valve of the reciprocating compressor are mounted as
follows - ✔✔Discharge valve on top of the valve plate and suction valve below
✔✔A high side float is used to maintain - ✔✔Constant level of refrigerant in the
evaporator
✔✔Which of these compressors is not a positive type compressor displacement -
✔✔Centrifugal
✔✔When is emergency power not required according to code - ✔✔Data centers
✔✔What is the most widely used regulation book by operating engineers - ✔✔EPA
✔✔What type of refrigerant do you need FDNY approval for - ✔✔Propane
✔✔Centrifugal pressure is determined by - ✔✔Speed of motor
✔✔Liquid refrigerant that has passed through a metering device is at - ✔✔Low pressure
saturated liquid
✔✔What is the advantage of a shell and tube condenser as oposed to a shell and coil
condenser - ✔✔Better heat transfer
✔✔Where is the muffler located - ✔✔Between the compressor and condenser
✔✔After recovering liquid refrigerant from a centrifugal chiller the next step shall be -
✔✔Recover vapor
, ✔✔How long must a fire alarm log book be kept - ✔✔3 years
✔✔What is the minimum requirement of an engineer needs to log readings - ✔✔Once
per shift
✔✔When entering phase 2 firemen service what statement is correct - ✔✔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 - ✔✔Do not leave the building
✔✔How often must you do emergency power testing - ✔✔Monthly
✔✔What is the responsibility of AB29 certificate of fitness holder - ✔✔Inspect the
battery system
✔✔An engineer observes a gauge to read saturation pressure of refrigerant if chilled
water circulated as the cooling medium this reading best be used to estimate the -
✔✔Temperature of the chilled water being pumped to the spaces being cooled
✔✔Regardless of the ASHRAE refrigeration classification in use in the event of a
refrigerant escape the engineer should be aware of - ✔✔asphyxiation
✔✔When is a chemical fire extinguisher and system needed - ✔✔Where water is not
sufficient
✔✔What type of refrigerants found inside the machines gages - ✔✔Same type as the
refrigerant inside the machine
✔✔Fireproof decorations in buildings are used for - ✔✔They don't catch fire in an
emergency
✔✔Water regulating valves are used for - ✔✔Maintain condenser pressure To a pre
determined level
✔✔How long does it take to warm up a steam turbine - ✔✔10 to 15 minutes
✔✔Why is a pressure relief out better than a fusible plugs - ✔✔Minimize refrigerant los
✔✔You are performing hot work near a sprinkler head what can you do to prevent the
fire alarm system from going off - ✔✔Put a non combustible barrier to protect the
sprinkler
