FDNY Z51 Test Exam Recent Version Updated with All Questions/ Z51 Written Test Tauris Questions

FDNY Z51 Test Exam Recent Version Updated
with All Questions/ Z51 Written Test Tauris
Questions


In a steam turbine, what is the function of a Kingsbury thrust bearing?
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A) Maintain first stage steam pressure.
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B) Compensate for coupling misalignment.
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C) Adjust shaft torque at start up.
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D) Maintain axial positioning of the rotor shaft. - ANS-D) Maintain axial positioning of the rotor
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g shaft.


The ratio of actual pressure of water pressure in the atmosphere to the saturated pressure of
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g given temperature is
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A) partial pressure.
g g




B) relative humidity.
g g




C) humidity effect.
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D) absolute humidity. - ANS-
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The total amount of heat to be removed from the refrigerant in a condenser equals the heat
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g picked up in the g g g

,A) evaporator plus the heat of compression.
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B) evaporator.
g




C) evaporator plus the heat of included non-condensable.
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D) evaporator less the heat given up in the muffler. - ANS-
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When must the Fire Department be notified that a fire protection system is out of service?
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A) The manual pull alarm station in the lobby will be out of service for 4 hours.
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B) Four sprinkler heads on a same floor of your building will be out of service for 2 hours.
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C) The sprinkler system will be out of service on 1st and 2nd floors.
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D) The fire alarm system is out of service in the refrigerating system room for g hours. - ANS-C)
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g The sprinkler system will be out of service on 1st and 2nd floors.
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Hot work authorizations are issued by
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A) a Responsible Person designated by the Building Owner.
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B) a Building Department inspector.
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C) a FDNY inspector.
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D) the Building owner's insurance company. - ANS-A) a Responsible Person designated by the
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g building owner. g




Insecticidal fogging operations are hazardous because chemicals
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A) are corrosive.
g g




B) are water-reactive.
g g




C) may be toxic.
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D) are highly unstable. - ANS-C) may be toxic.
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,What is a compressor safety head?
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A) Rupture disc.
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B) A pressure relief valve on the low side.
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C) Cylinder head with a low pressure relief on the high side.
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D) A spring on the valve plate. - ANS-
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The oil collected in an oil separator is generally
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A) caused by an oil overcharge.
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B) returned to the compressor.
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C) filtered and returned to the compressor.
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D) drained and replaced by fresh oil. - ANS-
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Where is emergency power not required according to code?
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A) Fire pumps.
g g




B) High rise elevators.
g g g




C) Egress illumination.
g g




D) Data centers. - ANS-D) Data centers.
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Modern compressors usually seal the rotating shaft seal as it exits the compressor housing a
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g spring-loaded seal made of g g g




A) low-friction plastic.
g g




B) rubber.
g




C) metal or carbon.
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D) graphite-loaded fiber. - ANS-
g g g g

, A technician shows up to service the fire alarm panel in your building. What COF qualifications
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g must he/she have? g g




A) A Q-01/Q-99 Certificate of Qualification holder who is designated by the building owner.
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B) A certified Fire Safety Director who is designated by the building owner.
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C) A S-95 Certificate of Fitness holder who is employed by a FDNY certified company.
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D) A S-97/S-98 Certificate of Fitness holder who is employed by a FDNY certified company. - ANS-
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D) A S-97/S-98 Certificate of Fitness holder who is employed by a FDNY certified company.
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Which statement is correct regarding a fusible plug on a condenser?
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A) The melting point is marked on it.
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B) Are not allowed by code.
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C) Release refrigerant by pressure.
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D) Can be back-seated. - ANS-
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In an office building, the display of cut natural trees (Christmas trees) is
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A) never allowed.
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B) allowed provided they are removed once they dry out.
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C) always allowed.
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D) allowed during the holiday season. - ANS-A) never allowed.
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Describe the equipment's function in the picture.
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A) Control flow of refrigerant to the compressor.
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B) Remove non-condensable from the condenser.
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C) Relieve excess pressure from the condenser.
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