FDNY Z51 TEST EXAM ,Z51 WRITTEN TEST TAURIS AND A STUDY GUIDE EXAM 2024 VERSION 400 QUESTIONS WITH DETAILED VERIFIED ANSWERS AND RATIONALES /A+ GRADE ASSURED

FDNY Z51 TEST EXAM ,Z51 WRITTEN TEST TAURIS AND A STUDY GUIDE EXAM 2024 VERSION 400 QUESTIONS WITH DETAILED VERIFIED ANSWERS AND RATIONALES /A+ GRADE ASSURED FDNY Z51 EXAM 2024 A refrigerant engineer verifies that a chilled water pump is cavity to of the following the most likely cause for this condition is - ...ANSWER...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 - ...ANSWER...39.2ﾟ The use of oil in the refrigeration machine is to - ...ANSWER...Reduce wear and friction in the compressor parts Which of the following will connect to the Middle port on a gauge manifold - ...ANSWER...Vacuum pump There is a decrease in efficiency of a reciprocating compressor. The most likely is caused by - ...ANSWER...Leaking suction valve The suction and discharge valve of the reciprocating compressor are mounted as follows - ...ANSWER...Discharge valve on top of the valve plate and suction valve below A high side float is used to maintain - ...ANSWER...Constant level of refrigerant in the evaporator Which of these compressors is not a positive type compressor displacement - ...ANSWER...Centrifugal When is emergency power not required according to code - ...ANSWER...Data centers What is the most widely used regulation book by operating engineers - ...ANSWER...EPA What type of refrigerant do you need FDNY approval for - ...ANSWER...Propane Centrifugal pressure is determined by - ...ANSWER...Speed of motor Liquid refrigerant that has passed through a metering device is at - ...ANSWER...Low pressure saturated liquid What is the advantage of a shell and tube condenser as oposed to a shell and coil condenser - ...ANSWER...Better heat transfer Where is the muffler located - ...ANSWER...Between the compressor and condenser After recovering liquid refrigerant from a centrifugal chiller the next step shall be - ...ANSWER...Recover vapor How long must a fire alarm log book be kept - ...ANSWER...3 years What is the minimum requirement of an engineer needs to log readings - ...ANSWER...Once per shift When entering phase 2 firemen service what statement is correct - ...ANSWER...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 - ...ANSWER...Do not leave the building How often must you do emergency power testing - ...ANSWER...Monthly What is the responsibility of AB29 certificate of fitness holder - ...ANSWER...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 - ...ANSWER...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 - ...ANSWER...asphyxiation When is a chemical fire extinguisher and system needed - ...ANSWER...Where water is not sufficient What type of refrigerants found inside the machines gages - ...ANSWER...Same type as the refrigerant inside the machine Fireproof decorations in buildings are used for - ...ANSWER...They don't catch fire in an emergency Water regulating valves are used for - ...ANSWER...Maintain condenser pressure To a pre determined level How long does it take to warm up a steam turbine - ...ANSWER...10 to 15 minutes Why is a pressure relief out better than a fusible plugs - ...ANSWER...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 - ...ANSWER...Put a non combustible barrier to protect the sprinkler What type of sprinkler heads need inspecting - ...ANSWER...Automatic