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Exam (elaborations)

ELECTRICIAN NCCER QUESTIONS AND ANSWERS

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  • Course
  • NCCER Electrical
  • Institution
  • NCCER Electrical

ELECTRICIAN NCCER QUESTIONS AND ANSWERS

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  • August 28, 2024
  • 22
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NCCER Electrical
  • NCCER Electrical
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AGRADEPROMASTER
ELECTRICIAN NCCER QUESTIONS AND
ANSWERS

WhichaarticleaofatheaNECacoversagrounding?a-aans✔✔Articlea250

Whataisaaadropoutaplate?a-
aans✔✔Metalaplateawithaaacurveasurfaceaforacableatoafollowaasaitapassesafromatheatray



AllaofatheafollowingaareacommonaserviceavoltagesainatheaUnitedaStatesaExcept:a-
aans✔✔372/575a3-Phase,a4-wire



WhatadoesaaaGFCIabreakerado?a-
aans✔✔Opensaaacircuitatoapreventaoperationaofaanaelectricaladevice



Whatawillahappenawhenaoneaoramoreacoilsainaaawindingaareagrounded?a-
aans✔✔Theamotorawillaautomaticallyablowafuses



eightaincandescentalightingafixturesaareatoabeainstalled.aEachafixtureaisa120avolts,awithaaa2
00-whattalampawhataisatheatotalaconnectedaload?a-aans✔✔13.3aAmps

Thea__________mustabeagroundedainaaabussedaglutteraifauseaasatheamainaserviceaequip
memta-aans✔✔Neutralabusbar

Whenawallamountingacableatray,aensureathata-
aans✔✔Theabuildingastructureaisastrongaenoughatoasupportatheatrayasystem



Theapurposeaofasealingacableaendsawhenareelsaofacableaareainastorageaisa____________
__a-aans✔✔toakeepamoistureafromacreepingain

Theaouteracoveringaonaliquid-tightaflexibleametalaconduitaisauseafora-
aans✔✔Aamoistureaseal



Aagoodaelectricalaconnectionashoulda-aans✔✔Beamechanicallyaandaelectricallyasecure

Theasymbolanormallyauseaforaduplexa-
aans✔✔Circleawithatwoaparallelalinesadrawathroughait



Disconnectingameansaareacoveredaina-aans✔✔NECasectiona110-22

,Inarelationatoaswitches,atheatermathrowarefersatoathea-
aans✔✔Numberaofainternalaoperationsathataswitchacanaperform



Aa3-phase,a4-wire,a480vaservicearequiresa________acurrentatransformersa-aans✔✔3

Servicesaconductorsaandaequipmentaareacoveredaina-aans✔✔NECaArticlea230

TheaNECarequiredathataallareceptaclesainstalledaona25aampaanda20aampabranchacircuitsab
e__________areceptaclesa-aans✔✔Grounding

Theacircularamilaisabasedaonathea-aans✔✔Cross-sectionalaareaaofatheawire

Aatransformerawithatheaprimaryaofa400aturnsaandaaasecondaryaofa300aturnsahasaaa-
aans✔✔Stepadownaturnsaratioaofa4:3



Ofatheaterminationaclassesalistedabelow,_____aisatheaonlyaoneathataprovidesaaasealaagain
staexternalaelementsa-aans✔✔Classa1

Unlessaotherwiseanoted,atheacalculationsainaACacircuitsa______avaluesa-aans✔✔Rms

Whenatheacoilaturnsaincreasedathea________a-aans✔✔Inducedavoltageaisaincreased

Asatheatemperatureasurroundingaaaselfaregulatingaheatingacablearises,athea________a-
aans✔✔Resistanceaofatheapolymericacoreaincreases



Theamotoratypeathatahasatheahighestastartingatorqueaisathea_________amotora-
aans✔✔Capacitora-astart



Foraaagivenanumberaofapoles,athe________adeterminesatheaspeedaofaanaACaMotor.a-
aans✔✔Frequency



Bothainductionaandasynchronousamotoraoperateaonatheaprincipleaofathearotating________f
ielda-aans✔✔Magnetic

AaTransformerahasa200aturnsainatheaprimary,a150aturnsainatheasecondary,aanda120VACaa
ppliedatoatheaprimary.aTheavoltageaacrossatheasecondaryaisa-aans✔✔90aVolts

Theaoutputacapacityaofaaamotoraisaratedaina-aans✔✔Horsepower

Theasynchronousaspeedaatawitchaa4apole,a60aHzainductionamotoraoperatesaisa________ar
pma-aans✔✔1800

Theasineaofa0adegreeaisa-aans✔✔0

InaaaACacircuitacontainingaresistanceaonly,a_______a12Aawillaflowaifathearesistanceaisa10ao
hmsaandatheavoltageaisa120Va-aans✔✔12A

, Thea_____arotoratypesaareagenerallyaruggeda-aans✔✔Squirrelacage

Theacomponentealabeleda7ainafigurea1aisaaa(an)a-aans✔✔Endaseal

MetersausedainaACacircuitsaindicateathe_______a-aans✔✔Effective

Proofsatestsaareamadeaat________aoFatheaoriginalafactoryavoltagea-aans✔✔60%

Whichatypeaofaheatingacableacananotabeacutaandaterminatedainatheafield?a-
aans✔✔Mineralainsulated



TheasecondaryaofaaaCTaunderaloadashouldanotabeaopenedabecauseaof______a-
aans✔✔Inducedahightavoltage



Inaaatransformer,______a-aans✔✔Electromagneticainductionaoccurs

Whenaaagroundarodaisainstalled,atheatopaofathearodamustabeapositioneda_____.gradea-
aans✔✔Flushawithaorabelow



Whenamakingaoffsetabends,atheatwoakicksamustabeamadeaperfectlyaparallelaorathearesultin
gaoffsetawillahaveaaa________a-aans✔✔Crookedabend

Allaofatheafollowingatypesaofaconduletamayabeausedaasaaapullingapointaforaconduitathatarequ
iresaaa90adegreeachangeainadirection,aexcept_______a-aans✔✔C

Toabeaeffective,aaagroundingasystemamustalimitatheavoltageaonatheaelectricalasystemaanda
protectaitafromaallaofatheafollowing,aexcepta______a-aans✔✔Undervoltageaconditions

Whataisatheamostacommonaserviceauseainaaatemporaryapowerapanel?a-
aans✔✔120/240avolt,a1-phase,a3-wire



Whataareathea2amostacommonatypesaofaovercurrentaprotectiveadevices?a-
aans✔✔Circuitabreakersaandafuses



Whatainstrumentaisauseatoaperformaanainsulationaresistanceatestaonaaa480avoltamotorawind
ing?a-aans✔✔Megohmmeter

WhataisaaasealainstalledainaaarunaofaconduitainaaaclassaIalocation?a-
aans✔✔Preventatheapassageaofaexplosiveagasesainatheaconduit



WhichaofatheafollowingaisatheacorrectaformulaaforaOHM'salaw?a-aans✔✔I=E/R

Whichaofatheafollowingatestingainstrumentsaoperatedaonatheacurrentatransformeraprinciplea
-aans✔✔Clamp-onaammeter

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