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Exam (elaborations)

Electric Heat ESCO - HVAC Excellence Exam Questions and Answers 2025

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Electric Heat ESCO - HVAC Excellence Exam Questions and Answers 2025

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Institution
HVAC Excellence - ELECTRICITY
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HVAC Excellence - ELECTRICITY

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Uploaded on
May 9, 2025
Number of pages
5
Written in
2024/2025
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Exam (elaborations)
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  • electric heat esco hvac excellence exam question

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Electric Heat ESCO - HVAC Excellence
Exam Questions and Answers 2025
BeforeAworkingAonAanAelectricAfurnaceAtheAtechAshouldA-ACORRECTAANSWERSA-
ReviewAdiagram,AremoveAjewelry,AandAfollowAsafetyAprocedures.AALLAOFATHEAABOVE.
AAGFCIAcircuitAbreakerA-ACORRECTAANSWERSA-detectsAcurrentAleaksAtoAgroound
theAconductorAinAanAelectricAheatAelementAisAusuallyAmadeAofA-ACORRECTAANSWERSA-
Nichrome
AnAexampleAofAresistiveAloadAisA-ACORRECTAANSWERSA-crankcaseAheater
anAexampleAofAanAinductiveAloadAisA-ACORRECTAANSWERSA-motor
anAelectricAfurnaceAisAmarkedA208/230AsingleAphaseA60HzAAAtechAreadsA200AvacAatAtheAp
owerAsupplyAandAdeterminesA-ACORRECTAANSWERSA-theAvoltageAisAtooAlow
voltageAimbalanceAbetweenAanyAlegAofA3AphaseApowerAsupplyAmayAnotAexceedA-
ACORRECTAANSWERSA-2%

theAlimitAswitchAonAanAelectricAfurnaceAisAaA-ACORRECTAANSWERSA-
AutomaticAresetAswitch
theAsequencerAtimersAonAelectricAheaterAwillAusuallyAenergizeAtheA1stAheatingAelementAaft
erAaAtimeAdelayAofA-ACORRECTAANSWERSA-1AtoA30Asec
theAamountAofAbtusAproducedAbyA1AwattAofAelectricityAisA-ACORRECTAANSWERSA-
3.413Abtus
aAtechAreadsA60AampsAwithAaAclampAonAampAmeterAonAaAforcedAairAfurnace.AtheAsupplyAvol
tageAisA230AvoltsAAC,AapproxAhowAmanyAwattsAisAtheAfurnaceAusingA-
ACORRECTAANSWERSA-13,800

aAfurnaceAisAusingA15,500AwattsAapproxAKwA-ACORRECTAANSWERSA-15.5AKw
aAsequencerAtimerAuseA_____AtoAcloseAtheAcontactApointsAtoAtheAheaterAelementA-
ACORRECTAANSWERSA-heatedAsnap-discsAorAbi-metalAstrips

anAelectricAfurnaceAheatingAthermostatAmustA-ACORRECTAANSWERSA-
openAonAriseAcloseAonAdrop
aAstandardAthermostatAheatAanticipatorAisA____AandAwiredAinA____AwithAtheAheatingAcontro
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someAthermostatAmanufacturersArequireAaAjumperAconnectionAonAtheAthermostatAsubbase
AofAheatingAandAcoolingAthermostatAinAorderAtoA-ACORRECTAANSWERSA-

useAaAsingleAtransformer
mostAelectricAheatAelementsAuseAtheAfollowingAsaftiesAtoApreventAoverheatingA-
ACORRECTAANSWERSA-snapAdiscAandAfusibleAlink

aAtechAreadsA70AampsAtoAtheAsingleAphaseAheaterA.AtheAsupplyAvoltageAisA230AvoltsAAc.AAp
proxAhowAmanyAbtusAisAtheAfurnaceAproducingA-ACORRECTAANSWERSA-54,949
theAcontrolAthatApreventsAductAheaterAfromAoperatingAunlessAthereAisAadequateAsupplyAairAi
sA-ACORRECTAANSWERSA-fanAinterlock
theACOPAforAelectricAresistanceAheatAisA-ACORRECTAANSWERSA-1AtoA1
whatAisAtheAmaximumAkWAelementAusedAonAeachAcontactAofAaAresidentialAheatAsequencerA
-ACORRECTAANSWERSA-5AkW

, electricAheatersAareAgenerallyAratedAatA____AvoltsAacAforAkW AoutputA-
ACORRECTAANSWERSA-240

theAfirstAstageAofAaAsequencerAusuallyAhasAaAsetAofAcontactsAtoA-ACORRECTAANSWERSA-
startAtheAblowerAfanAmotor
anAautomaticAresetAsafetyAonAaAheaterAelementAgenerallyAopensAatA____*FA-
ACORRECTAANSWERSA-130-190*F

mostAheatingAelementsAareAmountedAonAwhichAtypeAofAinsulatorA-
ACORRECTAANSWERSA-micaAorAceramic

aA10AkW AelectricAheaterAoperatingAatA240AvAdrawsA42Aamps,AwhatAwillAaA10AkW AheaterAwir
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theApurposeAofAaAsequencerAisAtoA-ACORRECTAANSWERSA-avoidAaAsuddenApowerAload
twoAmajorAfactorsAinAdeterminingAtheAtempAriseAofAanAelectricAfurnaceAareA-
ACORRECTAANSWERSA-furnaceAKW AandACFM

aAmajorAcauseAofAelectricalAheatAelementAburnAoutA-ACORRECTAANSWERSA-lowAairflow
aAtechAisAcheckingAtheAresistanceAonAdeltaAwiredA3AphaseA240AvA15AkWAelecticAductAheate
rAifAoneAelementAisAopenAheAwouldAreadA-ACORRECTAANSWERSA-
L1AtoAL2A22OhmAL1AtoAL3A22ohmAL2AtoAL3Ainfinity
theApurposeAofAsettingAaAheatAanticipatorAproperlyAisAtoA-ACORRECTAANSWERSA-
controlAcyclingAtime
aA10AkW AheaterAinstalledAinAaA2AtonAcentralAairAconditioningAheatingAfurnaceAshouldAhaveA
anAairAflowAofA_____ACFMA-ACORRECTAANSWERSA-600A-A800
resistanceAtoAairAflowA(staticApressure)AinAanAelectricAheaterAisAmeasuredAinA-
ACORRECTAANSWERSA-inchesAwaterAcolumn

toAproperlyAsetAaAheatAanticipatorAtheAtechAshouldAmeasureAtheAampsAbetweenAterminalsA
__AandA___AonAsubbaseA-ACORRECTAANSWERSA-R-W
aAtechAisAinstallingAaA3AtonAcoolingAsystemAwithAaA15AkwAelectricAfurnace.AtheAthermostatAw
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aA1/3AsingleAphaseAPSCAelectricAblowerAmotorAwouldAdrawAapproxA___AatA240AvAACA-
ACORRECTAANSWERSA-2-4Aamps

onAaAdeltaAwiredAheaterAaAtechAreadsAL1AtoAL2A11AohmAL1AtoAL3A22AohmsAandAL2AtoAL3A11A
ohmA-ACORRECTAANSWERSA-elementAbetweenAL1AandAL3AisAshorted
aA1200ACFMAfurnaceAoperatingAwithAaA10kW AheaterAatA240AvAACAwouldAhaveAaAtempAriseA
ofA______A*FA-ACORRECTAANSWERSA-20A-A30
AAtechAisAcheckingAtheAoutputAofAaA5AkW AsupplementalAheaterAusedAwithAaAheatApump.ATh
eAheatingAelementAisAcontrolledAbyAwhatAstageAofAtheAthermostatA-
ACORRECTAANSWERSA-AuxiliaryAheating

ToAmeasureAsupplyAgrillAairAspeed,AtheAtechAshouldAuseAanA-ACORRECTAANSWERSA-
anemometer
whenAinstallingAaArooftopAheatingAandAcoolingAunit,AtoApreventAcondensateApanAproblemsA
youAshouldA-ACORRECTAANSWERSA-trapAtheAdrainAline
theAcontactApointsAofAaAsequencerAonAaAliveAheaterAmayAbeAcheckedAbyAusingAthisAmeterA-
ACORRECTAANSWERSA-voltmeter

whenAremovingAanyAhighAvoltageAcomponentAforAsafetyAtheAtechAshouldA-
ACORRECTAANSWERSA-lockAout/tagAoutApowerApanel

theAbestAmethodAtoAinstallAaAflexibleAductAtoAaAmetalAcollarAisAtoA-ACORRECTAANSWERSA-
tieAwrapAandAmasticAtheAinnerAandAouterAliners
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