FDNY Z51 FDNY Z-51 EXAM 2024 WITH 200+ REAL EXAM QUESTIONS AND 100 CORRECT ANSWERS GRADED A REAL FDNY Z51 EXAM LATEST VERSION(BRAND NEW!!)

FDNY Z51 TEST EXAM ,Z51 WRITTEN T g g g g g g


EST TAURIS AND A STUDY GUIDE EXA
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M 2024 VERSION 400 QUESTIONS WITH
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DETAILED VERIFIED ANSWERS AND R g g g g


ATIONALES /A+ GRADE g g


ASSURED

FDNY Z51 EXAM 2024 g g g




A refrigerant engineer verifies that a chilled water pump is cav
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ity to of the following the most likely cause for this condition i
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s - ...ANSWER...Water leaks through the mechanical seals
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The only refrigerant/temperature chart available to a refrigera
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tion engineer lists the temperature In ﾟ
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C if the chart indicates a Celsius temperature of 4ﾟ
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this is equivalent to -
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...ANSWER ...39.2ﾟ

The use of oil in the refrigeration machine is to -
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...ANSWER...Reduce wear and friction in the compressor part g g g g g g g


s

Which of the following will connect to the Middle port on a ga
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uge manifold - ...ANSWER...Vacuum pump
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There is a decrease in efficiency of a reciprocating compressor
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. The most likely is caused by -
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...ANSWER...Leaking suction valve g g

,The suction and discharge valve of the reciprocating compress
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or are mounted as follows -
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...ANSWER...Discharge valve on top of the valve plate and su g g g g g g g g g


ction valve below g g




A high side float is used to maintain -
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...ANSWER...Constant level of refrigerant in the evaporator g g g g g g




Which of these compressors is not a positive type compresso
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r displacement - ...ANSWER...Centrifugal
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When is emergency power not required according to code -
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...ANSWER...Data centers g




What is the most widely used regulation book by operating en
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gineers - ...ANSWER...EPA g g




What type of refrigerant do you need FDNY approval for -
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...ANSWER...Propane

Centrifugal pressure is determined by - g g g g g


...ANSWER...Speed of motor
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Liquid refrigerant that has passed through a metering device is
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at - ...ANSWER...Low pressure saturated liquid
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What is the advantage of a shell and tube condenser as oposed
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to a shell and coil condenser -
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g...ANSWER...Better heat transfer g g

,Where is the muffler located -
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...ANSWER...Between the compressor and condenser
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After recovering liquid refrigerant from a centrifugal chiller th
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e next step shall be - ...ANSWER...Recover vapor
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How long must a fire alarm log book be kept -
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...ANSWER...3 years g




What is the minimum requirement of an engineer needs to lo
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g readings - ...ANSWER...Once per shift
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When entering phase 2 firemen service what statement is corr
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ect - g


...ANSWER...The elevator operator is the only person that ca
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n control the elevator
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You are the only engineer on duty with the machine running a
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vice president tells you to shovel snow what should you do
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- ...ANSWER...Do not leave the building
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How often must you do emergency power testing -
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...ANSWER...Monthly

What is the responsibility of AB29 certificate of fitness holder
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- ...ANSWER...Inspect the battery system
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An engineer observes a gauge to read saturation pressure of r
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efrigerant if chilled water circulated as the cooling medium t
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his reading best be used to estimate the -
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...ANSWER...Temperature of the chilled water being g g g g g g


pumped to the spaces being cooled g g g g g

, Regardless of the ASHRAE refrigeration classification in us
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e in the event of a refrigerant escape the engineer should be a
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ware of - ...ANSWER...asphyxiation
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When is a chemical fire extinguisher and system needed -
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...ANSWER...Where water is not sufficient g g g g




What type of refrigerants found inside the machines gages -
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...ANSWER...Same type as the refrigerant inside the machin g g g g g g g


e

Fireproof decorations in buildings are used for -
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...ANSWER...They don't catch fire in an emergency g g g g g g




Water regulating valves are used for -
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...ANSWER...Maintain condenser pressure To a pre determin g g g g g g


ed level
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How long does it take to warm up a steam turbine -
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...ANSWER...10 to 15 minutes g g g




Why is a pressure relief out better than a fusible plugs -
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...ANSWER...Minimize refrigerant los g g




You are performing hot work near a sprinkler head what can y
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ou do to prevent the fire alarm system from going off -
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...ANSWER...Put a non combustible barrier to protect the spri g g g g g g g g


nkler

What type of sprinkler heads need inspecting -
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...ANSWER...Automatic