Q-01 FDNY Questions and Answers 2025

Q-01 FDNY Questions and Answers 2025
RuptureAmembers,AwhenAusedAinAparallelAwithAaAreliefAvalve,AareAnotAtoAexceedA_____%A
aboveAdesignedAworkingApressureA-ACORRECTAANSWERSA-20%
ButterflyAvalve:AwhereAcanAitAbeAused?A-ACORRECTAANSWERSA-
CanAbeAusedAonAtheAinletAandAoutletAofAaAwaterApump
WhatAelectricalAmotorAprotectionAdeviceAautomaticallyAresetsAitself?A-
ACORRECTAANSWERSA-TheAthermalAprotector

746AwattsAequalsAhowAmanyAkilowattAhours?A-ACORRECTAANSWERSA-
.746AkilowattAhours
WhatApositionAisAtheAliquidAlineAserviceAvalveAnormallyAin?A-ACORRECTAANSWERSA-
Back-seated
InAanAoperatingAevaporator,AoilAstaysAonAtopAofAwhichArefrigerant?A-
ACORRECTAANSWERSA-CarbonAdioxide,AR-744

AtAwhatApressureAdoesAtheAreliefAvalveAblowAonAaAhighApressureAmachine?A-
ACORRECTAANSWERSA-300Apsi

WhatAwouldAindicateAaArestrictionA(suchAasAdirtAorAscale)AinAtheAliquidAline?A-
ACORRECTAANSWERSA-FrostAimmediatelyAafterAtheArestriction

WhatAdoesAsolubilityAmean?A-ACORRECTAANSWERSA-
TheAabilityAofAaArefrigerantAtoAmixAwithAotherAsubstances
ChargingAVaporA—InAaAcompressionAsystem,AwhereAdoAyouAchargeAtheAvapor?A-
ACORRECTAANSWERSA-SuctionAsideAofAtheAcompressorAatAtheASuctionAServiceAValve

WhenAcomparingAaAbrineAwithAsAPHAofA8AtoAoneAwithAaAPHAofA10,AitsAalkalinityAis:A-
ACORRECTAANSWERSA-100AtimesAgreaterA(ex.APHA8AtoAPHA9AisA10AtimesAgreater)

InAanAefficientlyAoperatingAinducedAdraftAcoolingAtower,AtheAleavingAwaterAisAbetween:A-
ACORRECTAANSWERSA-DryAbulbAandAwetAbulbAtemperature

ToAproduceAtheAdesiredAevaporatorAtemperature,AtheApowerAinputAisAreducedAbyAkeepingA
headApressure...A-ACORRECTAANSWERSA-
HeadApressureAasAlowAasApossibleA&AsuctionApressureAasAhighAasAneeded
TheAaccumulatorAisAusuallyAbetweenAthe...A-ACORRECTAANSWERSA-
CompressorAandAevaporator
AnAoilingAsystemAinAaAlargeAcentrifugalAsystemAshouldAconsistAofAatAleast...A-
ACORRECTAANSWERSA-Reservoir,ApumpAandAdistributionAlines

InAanAevaporatorAthatAchillsAbrine,AtheAgreatestAcoolingAeffectAonAtheAbrineAresultsAfromAthe
...A-ACORRECTAANSWERSA-BoilingAofAlowApressureAliquid
TheAflowAofAweakAliquorAtoAtheAabsorberAisAcontrolledAby
A)AgasApressure
B)AthrottlingAdevice
C)AfloatAvalve
D)ApressureAofAtheAstrongAliquorApumpA-ACORRECTAANSWERSA-B)AthrottlingAdevice
TheAbestAwayAofAdetectingAammoniaAbrineAisAbyAusing
A)ACO2Agas
B)ApotassiumAofAlime
C)ANesslerAreagent

,D)AcarbonateAofAsodaA-ACORRECTAANSWERSA-C)ANesslerAreagent
TheAbestAtimeAtoApurgeAanAammoniaAplantAwithA250Albs.AofAammoniaAis
A)AduringAshut-down,AbecauseAyouAwillAloseAammonia
B)AwhileAchargingAtheAplant
C)AduringAoperation
D)AnoneAofAtheAaboveA-ACORRECTAANSWERSA-C)AduringAoperation
WhatAwillAmakeAtheAstrongAliquorAinAtheAabsorberAdecrease?
A)AexpansionAvalveAopenAtooAmuch
B)AAAdecreaseAinAevaporatorAload
C)AAnAincreaseAinAevaporatorAload
D)ATooAmuchAsteamAonAtheAgeneratorA-ACORRECTAANSWERSA-
B)AAAdecreaseAinAevaporatorAload
WhichAofAtheAfollowingAstatementsAisAincorrect?
A)AAAserviceAvalveAisAaAkey-operatedAshut-
offAvalveAusedAduringAshipment,AinstallationAandArepairs
B)ABrineAisAaAliquidAcooledAbyArefrigerationAandAusedAforAtheAtransmissionAofAheat
C)AAAfusibleAplugAhasAaAset-temperatureAfusibleAmemberAtoArelieveApressure
D)AAAruptureAmemberAautomaticallyArupturesAatAaApredeterminedAtemperatureA-
ACORRECTAANSWERSA-

D)AAAruptureAmemberAautomaticallyArupturesAatAaApredeterminedAtemperature
OilAinAaArefrigerantAshould
A)AhaveAaAhighApourApoint
B)AhaveAaAlowAflashApoint
C)AhaveAaAhighAviscosity
D)AnotAcontainAmoistureA-ACORRECTAANSWERSA-D)AnotAcontainAmoisture
InAanANH3AdryAexpansionAevaporatorAwithATXVAandAbulbAclampedAproperlyAonAtheAoutletA
ofAtheAevaporator,AtheAsuperheatAis
A)A7AtoA10°AF
B)A5AtoA9°AF
C)A20AtoA30°AF
D)A1AtoA2°AFA-ACORRECTAANSWERSA-A)A7AtoA10°AF
TheAsettingAofAaAfusibleAplugAis
A)A280°AF
B)A300°AF
C)A380°AF
D)A300Apsig.A-ACORRECTAANSWERSA-A)A280°AF
IfAtheAinsulationAwasAremovedAfromAtheAbulbAofAtheAexpansionAvalve,AwhatAwouldAhappen
?A-ACORRECTAANSWERSA-FloodedAevaporatorA—
theATXVAbulbAopensAinAaArangeAfromA45AtoA85°AF.AIfAtheAinsulationAwasAremoved,AtheAbulbA
wouldAsenseAtheAtemperatureAinAtheAmachineAroomAandAkeepAtheATXVAopen,AthusAfloodin
gAtheAevaporator.
OnAtheAmostAcommonAthree-phase,Afour-
wireAservice,AtheAvoltageAbetweenAanyAphaseAandAneutralAshouldAbe
A)A105Avolts
B)A120Avolts
C)A208Avolts

, D)A220AvoltsA-ACORRECTAANSWERSA-B)A120Avolts
AArefrigerantAoverchargeAwould
A)AincreaseAheadApressure
B)AdecreaseAheadApressure
C)AdecreaseAsolution-sideApressure
D)AdecreaseAdischarge-sideApressureA-ACORRECTAANSWERSA-
A)AincreaseAheadApressure
AAdryerAisAgenerallyAinstalledAwithAotherAequipmentAinAaAcommercialAFreonAcompressorAs
ystem.ATheArecommendedAlocationAofAthisAdryerAisAonAthe
A)Ahigh-pressureAlineAbetweenAcondenserAandAreciever
B)AsuctionAlineAbetweenAevaporatorAandAcompressor
C)AdischargeAlineAbetweenAcompressorAandAcondenser
D)AliquidAlineAbetweenAreceiverAandAexpansionAvalveA-ACORRECTAANSWERSA-
D)AliquidAlineAbetweenAreceiverAandAexpansionAvalve
R-22A—WhatAdoesAitAsmellAlike?A-ACORRECTAANSWERSA-Odorless
DesirableAcharacteristicsAofAaArefrigerant:
A)AHighA__________
B)ALowA__________A-ACORRECTAANSWERSA-A)AHighAcriticalApoint
B)ALowAfreezingApoint
CentrifugalAFeedAWaterAPump
A)AStart-upAprocedure
B)AShut-downAprocedureA-ACORRECTAANSWERSA-A)AStart-upAprocedure
A1)ALock-out,Atag-out

A2)ACloseAdischargeAvalve

A3)AOpenAsuctionAvalve

A4)ATurnAon

A5)AOpenAdischargeAvalve

B)AShut-downAprocedure
A1)ALock-out,Atag-out

A2)AcloseAsuctionAvalve

A3)AcloseAdischargeAvalve

InAorderAtoAvaryAtheAcapacityAofAanAabsorptionAplant,AyouAshouldAregulateAthe..A-
ACORRECTAANSWERSA-FlowAofAtheAwaterAtoAtheAcondenser

600,000AbtuAperAhourAequalsAhowAmanyAtonsAofArefrigeration?
A)A300
B)A3,000
C)A500
D)A50A-ACORRECTAANSWERSA-D)A50
HeatAtransferAtakesAplaceAby
A)Aevaporation,AconductionAandAcondensation
B)Aradiation,AconductionAandAconvection
C)Acondensation,AevaporationAandAradiation
D)Asublimation,AevaporationAandAconvectionA-ACORRECTAANSWERSA-
B)Aradiation,AconductionAandAconvection
RefrigerantArecoveryAisAdefinedAas