CSN HVAC Excellence: Electrical Questions
and Answers 2025 Secure Pass
WhenAtroubleshootingAtheAA/CAsystemAinAtheAschematic,AtheAfollowingAconditionsAareA
found.ATheAthermostatAcontactsAareAclosed.ATheAcompressorAandAcondenserAfanAareAnotA
running.ATheAblowerAmotorArunning.AThisAcouldAbeAcausedAby:A-ACORRECTAANSWERSA-
aAfaultyAblowerAmotor/blowerArelay
WhenAtroubleshootingAtheAA/CAsystemAinAtheAschematic,AtheAfollowingAconditionsAareAfou
nd.ATheAthermostatAcontactsAareAclosed.ATheAcompressorAandAcondenserAfanAareAnotArun
ning.ATheAblowerAmotorAisArunning.AThisAcouldAbeAcausedAby:A-ACORRECTAANSWERSA-
theAHP,ALP,Aoverloads,AorAoilApressureAswitchAareAopen
ToAdischargeAaAcapacitorApriorAtoAohmmeterAtestingA-ACORRECTAANSWERSA-
useAaA15k/20kAohm,A2AtoA5AwattAresistorAacrossAtheAterminals
AcceptableAtemporaryAreplacementAforAaArunAcapacitorAratedAatA35MFDAatA440VACA-
ACORRECTAANSWERSA-37.5MFDAatA440VAC
TheAsynchronousAspeedAofAaAfourApoleA60AHzAsingleAphaseAmotorAisA-
ACORRECTAANSWERSA-1800ARPM
ExcessiveAcurrentAcanAbeAcausedAbyA-ACORRECTAANSWERSA-shortAcircuit
AAdeviceAwithAoverloadAprotectionAusedAtoAcontrolAaAmotorAisAaA-ACORRECTAANSWERSA-
lineAstarter
replaysAareAgenerallyAusedAtoAcontrolAinductiveAloadsAupAtoA___AampsA-
ACORRECTAANSWERSA-25
ContactorAareAratedAaccordingAtoAtheAmaxAamperageAthroughAtheA-
ACORRECTAANSWERSA-contacts
WhatAisAtheAminimumAnumberAofAwiresArequiredAbetweenAtwoAStart/StopApushAbuttonAcont
rolsA-ACORRECTAANSWERSA-3
IfAcontactsAbecomeAbadlyApitted,AitAisAacceptableAtoA-ACORRECTAANSWERSA-
replaceAtheAcontactsAorAcontrol
TheAthermalAoverloadAcontactsAonAaAlineAstarterAareAusuallyA____AresetA-
ACORRECTAANSWERSA-manual
TheA____AdrawingAillustratesAwereAtheAcomponentsAareAlocatedAinAsmallAappliancesA-
ACORRECTAANSWERSA-pictorial
WhatAmotorAisAtheAmostAenergyAefficientA-ACORRECTAANSWERSA-ECM
ResistanceAcanAbeAcalculatedAbyA-ACORRECTAANSWERSA-EAdividedAbyAI
VoltageAcanAbeAcalculatedAbyA-ACORRECTAANSWERSA-IAxAR
AnAohmmeterAshouldAneverAbeAconnectedAtoA-ACORRECTAANSWERSA-
aAchargedAcapacitorAuntilAitAhasAbeenAdischarged
WhichAofAtheAfollowingAwouldAbeAconsideredAanAinductiveAload?A-
ACORRECTAANSWERSA-electricAmotor
TheAvoltageAtoAgroundAofAaA"highAleg"AorA"stingerAleg"AonAaAthreeAphaseAopenADeltaAsyste
mAwillAbeAaroundA-ACORRECTAANSWERSA-208
and Answers 2025 Secure Pass
WhenAtroubleshootingAtheAA/CAsystemAinAtheAschematic,AtheAfollowingAconditionsAareA
found.ATheAthermostatAcontactsAareAclosed.ATheAcompressorAandAcondenserAfanAareAnotA
running.ATheAblowerAmotorArunning.AThisAcouldAbeAcausedAby:A-ACORRECTAANSWERSA-
aAfaultyAblowerAmotor/blowerArelay
WhenAtroubleshootingAtheAA/CAsystemAinAtheAschematic,AtheAfollowingAconditionsAareAfou
nd.ATheAthermostatAcontactsAareAclosed.ATheAcompressorAandAcondenserAfanAareAnotArun
ning.ATheAblowerAmotorAisArunning.AThisAcouldAbeAcausedAby:A-ACORRECTAANSWERSA-
theAHP,ALP,Aoverloads,AorAoilApressureAswitchAareAopen
ToAdischargeAaAcapacitorApriorAtoAohmmeterAtestingA-ACORRECTAANSWERSA-
useAaA15k/20kAohm,A2AtoA5AwattAresistorAacrossAtheAterminals
AcceptableAtemporaryAreplacementAforAaArunAcapacitorAratedAatA35MFDAatA440VACA-
ACORRECTAANSWERSA-37.5MFDAatA440VAC
TheAsynchronousAspeedAofAaAfourApoleA60AHzAsingleAphaseAmotorAisA-
ACORRECTAANSWERSA-1800ARPM
ExcessiveAcurrentAcanAbeAcausedAbyA-ACORRECTAANSWERSA-shortAcircuit
AAdeviceAwithAoverloadAprotectionAusedAtoAcontrolAaAmotorAisAaA-ACORRECTAANSWERSA-
lineAstarter
replaysAareAgenerallyAusedAtoAcontrolAinductiveAloadsAupAtoA___AampsA-
ACORRECTAANSWERSA-25
ContactorAareAratedAaccordingAtoAtheAmaxAamperageAthroughAtheA-
ACORRECTAANSWERSA-contacts
WhatAisAtheAminimumAnumberAofAwiresArequiredAbetweenAtwoAStart/StopApushAbuttonAcont
rolsA-ACORRECTAANSWERSA-3
IfAcontactsAbecomeAbadlyApitted,AitAisAacceptableAtoA-ACORRECTAANSWERSA-
replaceAtheAcontactsAorAcontrol
TheAthermalAoverloadAcontactsAonAaAlineAstarterAareAusuallyA____AresetA-
ACORRECTAANSWERSA-manual
TheA____AdrawingAillustratesAwereAtheAcomponentsAareAlocatedAinAsmallAappliancesA-
ACORRECTAANSWERSA-pictorial
WhatAmotorAisAtheAmostAenergyAefficientA-ACORRECTAANSWERSA-ECM
ResistanceAcanAbeAcalculatedAbyA-ACORRECTAANSWERSA-EAdividedAbyAI
VoltageAcanAbeAcalculatedAbyA-ACORRECTAANSWERSA-IAxAR
AnAohmmeterAshouldAneverAbeAconnectedAtoA-ACORRECTAANSWERSA-
aAchargedAcapacitorAuntilAitAhasAbeenAdischarged
WhichAofAtheAfollowingAwouldAbeAconsideredAanAinductiveAload?A-
ACORRECTAANSWERSA-electricAmotor
TheAvoltageAtoAgroundAofAaA"highAleg"AorA"stingerAleg"AonAaAthreeAphaseAopenADeltaAsyste
mAwillAbeAaroundA-ACORRECTAANSWERSA-208