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Exam (elaborations)

LEVEL 4 MODULE 1 HIGHLIGHTS QUESTIONS WITH CORRECT ANSWERS 2025.

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LEVEL 4 MODULE 1 HIGHLIGHTS QUESTIONS WITH CORRECT ANSWERS 2025.

Institution
HVAC HEATING
Course
HVAC HEATING

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LEVEL 4 MODULE 1 HIGHLIGHTS
QUESTIONS WITH CORRECT
ANSWERS 2025/2026
IfAtheAnumberAofAcurrentAcarryingAconductorsAinAtheAconduitAorAcableAexceedsA3,A-
AcorrectAanswersTheAampacityAofAtheAconductorsAmustAbeAadjustedAusingANECA310.15(C)(1).



FeederAamapacityAforAsingleAphaseAcircuitsAisAcalculatedAbyAdividingAVAAbyAtheAcircuitAvoltage.A
-AcorrectAanswersIA=AVA/V

FeederAampacityAforAbalancedAthreeAphaseAcircuitsAisAcalculatedAbyAdivingAVAAbyAtheAproductA
ofAtheAlineAtoAlineAcircuitAvoltageAandAtheAsquareArootAofA3A(1.732)A-
AcorrectAanswersIA=AVAAoverAVAmultipliedAbyA1.732.



UseAofAtheA100AfootAtapAruleAisAlimitedAtoAinstallationsAinAhighAbayAmanufacturingAbuildingsAwi
thA-AcorrectAanswersWallAheightsAoverA35Afeet.

AAdwellingAunitAhasAaAunitAlightingAloadA-AcorrectAanswersOfA3VAAperAsquareAfoot.

ComputeAtheAfloorAareaAofAtheAbuildingAusingAtheA-
AcorrectAanswersOutsideAdimensionsAofAtheAbuilding.



AddA100%AofAtheAnoncontinousAloadsAandA125%AofAtheAcontinuousAloads,A-
AcorrectAanswersthenAdivideAtheAresultAbyAtheAcircuitAvoltageAtoAfindAtheAcurrentArating.



DetermineAtheAgeneralAlightingAloadAusingANECAsectionA220.14(J)A-
AcorrectAanswersMultiplyAtheAresultingAareaAinAstepA1AbyAtheAunitAloadAforAtheAdwellingAunit.



TheAclothesAdryerAandAelectricArange,AhoweverAhaveA-
AcorrectAanswers120VAlightsAthatAwillAunbalanceAtheAcurrentAbetweenAphases.



NECAsectionA220.61(B)AallowsAaAdemandAfactorAofA-
AcorrectAanswers70%AforAtheseAtwoAappliances.



AdditionalAdemandAfactorsAmayAbeAappliedAtoAtheAportionAofAtheAneutralAloadAcontributedAbyA
-AcorrectAanswersElectricArangesAandAtheAportionAofAtheAtotalAneutralAloadAgreaterAthanA200A.

NECAsectionA220.43(A)ArequiresAthatAtheAlightingAloadAforAshowAwindowAfeedersAbeAcalculated
AatA-AcorrectAanswers200VAAperAlinearAfootAofAshowAwindow.



NECAsectionA220.44ApermitsAbothAgeneralApurposeAreceptaclesAatA180VAAperAoutletAandA-
AcorrectAanswersFixedAmultiAoutletAassembliesAtoAbeAadjustedAforAtheAdemandAfactorsAgivenAin


ANECAtablesA220.42AandA220.44.



MoreAthanA6AunitsAofAkitchenAequipmentA-
AcorrectAanswersWithAaAtotalAconnectedAloadAofA80kVA.
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Institution
HVAC HEATING
Course
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March 20, 2025
Number of pages
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Written in
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Type
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  • level 4 module 1 highlights questions with correct
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