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
lA-ACORRECTAANSWERSA-adjustable/series
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
edAtoA480AvoltsAdrawA-ACORRECTAANSWERSA-21Aamps
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
ouldArequireAwiringAaAminimumAofA____AconductorsA-ACORRECTAANSWERSA-4
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
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
lA-ACORRECTAANSWERSA-adjustable/series
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
edAtoA480AvoltsAdrawA-ACORRECTAANSWERSA-21Aamps
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
ouldArequireAwiringAaAminimumAofA____AconductorsA-ACORRECTAANSWERSA-4
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