Electrician NCCER Exam with Questions
and Correct Answers 2025
Which ,article ,of ,the ,NEC ,covers ,grounding? ,- ,CORRECT ,ANSWER-Article ,250
What ,is ,a ,dropout ,plate? ,- ,CORRECT ,ANSWER-Metal ,plate ,with ,a ,curve ,surface
,for ,cable ,to ,follow ,as ,it ,passes ,from ,the ,tray
All ,of ,the ,following ,are ,common ,service ,voltages ,in ,the ,United ,States ,Except: ,-
,CORRECT ,ANSWER-372/575 ,3-Phase, ,4-wire
What ,does ,a ,GFCI ,breaker ,do? ,- ,CORRECT ,ANSWER-Opens ,a ,circuit ,to ,prevent
,operation ,of ,an ,electrical ,device
What ,will ,happen ,when ,one ,or ,more ,coils ,in ,a ,winding ,are ,grounded? ,-
,CORRECT ,ANSWER-The ,motor ,will ,automatically ,blow ,fuses
eight ,incandescent ,lighting ,fixtures ,are ,to ,be ,installed. ,Each ,fixture ,is ,120 ,volts,
,with ,a ,200-watt ,lamp ,what ,is ,the ,total ,connected ,load? ,- ,CORRECT ,ANSWER-
13.3 ,Amps
The ,__________must ,be ,grounded ,in ,a ,bussed ,gutter ,if ,used ,as ,the ,main
,service ,equipment ,- ,CORRECT ,ANSWER-Neutral ,busbar
When ,wall ,mounting ,cable ,tray, ,ensure ,that ,- ,CORRECT ,ANSWER-The ,building
,structure ,is ,strong ,enough ,to ,support ,the ,tray ,system
The ,purpose ,of ,sealing ,cable ,ends ,when ,reels ,of ,cable ,are ,in ,storage ,is
,______________ ,- ,CORRECT ,ANSWER-to ,keep ,moisture ,from ,creeping ,in
The ,outer ,covering ,on ,liquid-tight ,flexible ,metal ,conduit ,is ,used ,for ,- ,CORRECT
,ANSWER-A ,moisture ,seal
A ,good ,electrical ,connection ,should ,- ,CORRECT ,ANSWER-Be ,mechanically ,and
,electrically ,secure
The ,symbol ,normally ,used ,for ,duplex ,- ,CORRECT ,ANSWER-Circle ,with ,two
,parallel ,lines ,draw ,through ,it
Disconnecting ,means ,are ,covered ,in ,- ,CORRECT ,ANSWER-NEC ,section ,110-22
,In ,relation ,to ,switches, ,the ,term ,throw ,refers ,to ,the ,- ,CORRECT ,ANSWER-
Number ,of ,internal ,operations ,that ,switch ,can ,perform
A ,3-phase, ,4-wire, ,480v ,service ,requires ,________ ,current ,transformers ,-
,CORRECT ,ANSWER-3
Services ,conductors ,and ,equipment ,are ,covered ,in ,- ,CORRECT ,ANSWER-NEC
,Article ,230
The ,NEC ,required ,that ,all ,receptacles ,installed ,on ,25 ,amp ,and ,20 ,amp ,branch
,circuits ,be__________ ,receptacles ,- ,CORRECT ,ANSWER-Grounding
The ,circular ,mil ,is ,based ,on ,the ,- ,CORRECT ,ANSWER-Cross-sectional ,area ,of
,the ,wire
A ,transformer ,with ,the ,primary ,of ,400 ,turns ,and ,a ,secondary ,of ,300 ,turns ,has ,a
,- ,CORRECT ,ANSWER-Step ,down ,turns ,ratio ,of ,4:3
Of ,the ,termination ,classes ,listed ,below,_____ ,is ,the ,only ,one ,that ,provides ,a
,seal ,against ,external ,elements ,- ,CORRECT ,ANSWER-Class ,1
Unless ,otherwise ,noted, ,the ,calculations ,in ,AC ,circuits ,______ ,values ,-
,CORRECT ,ANSWER-Rms
When ,the ,coil ,turns ,increased ,the ,________ ,- ,CORRECT ,ANSWER-Induced
,voltage ,is ,increased
As ,the ,temperature ,surrounding ,a ,self ,regulating ,heating ,cable ,rises, ,the
,________ ,- ,CORRECT ,ANSWER-Resistance ,of ,the ,polymeric ,core ,increases
The ,motor ,type ,that ,has ,the ,highest ,starting ,torque ,is ,the ,_________ ,motor ,-
,CORRECT ,ANSWER-Capacitor ,- ,start
For ,a ,given ,number ,of ,poles, ,the________ ,determines ,the ,speed ,of ,an ,AC
,Motor. ,- ,CORRECT ,ANSWER-Frequency
Both ,induction ,and ,synchronous ,motor ,operate ,on ,the ,principle ,of ,the
,rotating________field ,- ,CORRECT ,ANSWER-Magnetic
A ,Transformer ,has ,200 ,turns ,in ,the ,primary, ,150 ,turns ,in ,the ,secondary, ,and
,120VAC ,applied ,to ,the ,primary. ,The ,voltage ,across ,the ,secondary ,is ,-
,CORRECT ,ANSWER-90 ,Volts
The ,output ,capacity ,of ,a ,motor ,is ,rated ,in ,- ,CORRECT ,ANSWER-Horsepower
, The ,synchronous ,speed ,at ,witcha ,4 ,pole, ,60 ,Hz ,induction ,motor ,operates ,is
,________ ,rpm ,- ,CORRECT ,ANSWER-1800
The ,sine ,of ,0 ,degree ,is ,- ,CORRECT ,ANSWER-0
In ,a ,AC ,circuit ,containing ,resistance ,only, ,_______ ,12A ,will ,flow ,if ,the
,resistance ,is ,10 ,ohms ,and ,the ,voltage ,is ,120V ,- ,CORRECT ,ANSWER-12A
The ,_____ ,rotor ,types ,are ,generally ,rugged ,- ,CORRECT ,ANSWER-Squirrel ,cage
The ,componente ,labeled ,7 ,in ,figure ,1 ,is ,a ,(an) ,- ,CORRECT ,ANSWER-End ,seal
Meters ,used ,in ,AC ,circuits ,indicate ,the_______ ,- ,CORRECT ,ANSWER-Effective
Proofs ,tests ,are ,made ,at________ ,oF ,the ,original ,factory ,voltage ,- ,CORRECT
,ANSWER-60%
Which ,type ,of ,heating ,cable ,can ,not ,be ,cut ,and ,terminated ,in ,the ,field? ,-
,CORRECT ,ANSWER-Mineral ,insulated
The ,secondary ,of ,a ,CT ,under ,load ,should ,not ,be ,opened ,because ,of______ ,-
,CORRECT ,ANSWER-Induced ,hight ,voltage
In ,a ,transformer,______ ,- ,CORRECT ,ANSWER-Electromagnetic ,induction ,occurs
When ,a ,ground ,rod ,is ,installed, ,the ,top ,of ,the ,rod ,must ,be ,positioned
,_____.grade ,- ,CORRECT ,ANSWER-Flush ,with ,or ,below
When ,making ,offset ,bends, ,the ,two ,kicks ,must ,be ,made ,perfectly ,parallel ,or
,the ,resulting ,offset ,will ,have ,a ,________ ,- ,CORRECT ,ANSWER-Crooked ,bend
All ,of ,the ,following ,types ,of ,condulet ,may ,be ,used ,as ,a ,pulling ,point ,for
,conduit ,that ,requires ,a ,90 ,degree ,change ,in ,direction, ,except_______ ,-
,CORRECT ,ANSWER-C
To ,be ,effective, ,a ,grounding ,system ,must ,limit ,the ,voltage ,on ,the ,electrical
,system ,and ,protect ,it ,from ,all ,of ,the ,following, ,except ,______ ,- ,CORRECT
,ANSWER-Undervoltage ,conditions
What ,is ,the ,most ,common ,service ,use ,in ,a ,temporary ,power ,panel? ,-
,CORRECT ,ANSWER-120/240 ,volt, ,1-phase, ,3-wire
What ,are ,the ,2 ,most ,common ,types ,of ,overcurrent ,protective ,devices? ,-
,CORRECT ,ANSWER-Circuit ,breakers ,and ,fuses
and Correct Answers 2025
Which ,article ,of ,the ,NEC ,covers ,grounding? ,- ,CORRECT ,ANSWER-Article ,250
What ,is ,a ,dropout ,plate? ,- ,CORRECT ,ANSWER-Metal ,plate ,with ,a ,curve ,surface
,for ,cable ,to ,follow ,as ,it ,passes ,from ,the ,tray
All ,of ,the ,following ,are ,common ,service ,voltages ,in ,the ,United ,States ,Except: ,-
,CORRECT ,ANSWER-372/575 ,3-Phase, ,4-wire
What ,does ,a ,GFCI ,breaker ,do? ,- ,CORRECT ,ANSWER-Opens ,a ,circuit ,to ,prevent
,operation ,of ,an ,electrical ,device
What ,will ,happen ,when ,one ,or ,more ,coils ,in ,a ,winding ,are ,grounded? ,-
,CORRECT ,ANSWER-The ,motor ,will ,automatically ,blow ,fuses
eight ,incandescent ,lighting ,fixtures ,are ,to ,be ,installed. ,Each ,fixture ,is ,120 ,volts,
,with ,a ,200-watt ,lamp ,what ,is ,the ,total ,connected ,load? ,- ,CORRECT ,ANSWER-
13.3 ,Amps
The ,__________must ,be ,grounded ,in ,a ,bussed ,gutter ,if ,used ,as ,the ,main
,service ,equipment ,- ,CORRECT ,ANSWER-Neutral ,busbar
When ,wall ,mounting ,cable ,tray, ,ensure ,that ,- ,CORRECT ,ANSWER-The ,building
,structure ,is ,strong ,enough ,to ,support ,the ,tray ,system
The ,purpose ,of ,sealing ,cable ,ends ,when ,reels ,of ,cable ,are ,in ,storage ,is
,______________ ,- ,CORRECT ,ANSWER-to ,keep ,moisture ,from ,creeping ,in
The ,outer ,covering ,on ,liquid-tight ,flexible ,metal ,conduit ,is ,used ,for ,- ,CORRECT
,ANSWER-A ,moisture ,seal
A ,good ,electrical ,connection ,should ,- ,CORRECT ,ANSWER-Be ,mechanically ,and
,electrically ,secure
The ,symbol ,normally ,used ,for ,duplex ,- ,CORRECT ,ANSWER-Circle ,with ,two
,parallel ,lines ,draw ,through ,it
Disconnecting ,means ,are ,covered ,in ,- ,CORRECT ,ANSWER-NEC ,section ,110-22
,In ,relation ,to ,switches, ,the ,term ,throw ,refers ,to ,the ,- ,CORRECT ,ANSWER-
Number ,of ,internal ,operations ,that ,switch ,can ,perform
A ,3-phase, ,4-wire, ,480v ,service ,requires ,________ ,current ,transformers ,-
,CORRECT ,ANSWER-3
Services ,conductors ,and ,equipment ,are ,covered ,in ,- ,CORRECT ,ANSWER-NEC
,Article ,230
The ,NEC ,required ,that ,all ,receptacles ,installed ,on ,25 ,amp ,and ,20 ,amp ,branch
,circuits ,be__________ ,receptacles ,- ,CORRECT ,ANSWER-Grounding
The ,circular ,mil ,is ,based ,on ,the ,- ,CORRECT ,ANSWER-Cross-sectional ,area ,of
,the ,wire
A ,transformer ,with ,the ,primary ,of ,400 ,turns ,and ,a ,secondary ,of ,300 ,turns ,has ,a
,- ,CORRECT ,ANSWER-Step ,down ,turns ,ratio ,of ,4:3
Of ,the ,termination ,classes ,listed ,below,_____ ,is ,the ,only ,one ,that ,provides ,a
,seal ,against ,external ,elements ,- ,CORRECT ,ANSWER-Class ,1
Unless ,otherwise ,noted, ,the ,calculations ,in ,AC ,circuits ,______ ,values ,-
,CORRECT ,ANSWER-Rms
When ,the ,coil ,turns ,increased ,the ,________ ,- ,CORRECT ,ANSWER-Induced
,voltage ,is ,increased
As ,the ,temperature ,surrounding ,a ,self ,regulating ,heating ,cable ,rises, ,the
,________ ,- ,CORRECT ,ANSWER-Resistance ,of ,the ,polymeric ,core ,increases
The ,motor ,type ,that ,has ,the ,highest ,starting ,torque ,is ,the ,_________ ,motor ,-
,CORRECT ,ANSWER-Capacitor ,- ,start
For ,a ,given ,number ,of ,poles, ,the________ ,determines ,the ,speed ,of ,an ,AC
,Motor. ,- ,CORRECT ,ANSWER-Frequency
Both ,induction ,and ,synchronous ,motor ,operate ,on ,the ,principle ,of ,the
,rotating________field ,- ,CORRECT ,ANSWER-Magnetic
A ,Transformer ,has ,200 ,turns ,in ,the ,primary, ,150 ,turns ,in ,the ,secondary, ,and
,120VAC ,applied ,to ,the ,primary. ,The ,voltage ,across ,the ,secondary ,is ,-
,CORRECT ,ANSWER-90 ,Volts
The ,output ,capacity ,of ,a ,motor ,is ,rated ,in ,- ,CORRECT ,ANSWER-Horsepower
, The ,synchronous ,speed ,at ,witcha ,4 ,pole, ,60 ,Hz ,induction ,motor ,operates ,is
,________ ,rpm ,- ,CORRECT ,ANSWER-1800
The ,sine ,of ,0 ,degree ,is ,- ,CORRECT ,ANSWER-0
In ,a ,AC ,circuit ,containing ,resistance ,only, ,_______ ,12A ,will ,flow ,if ,the
,resistance ,is ,10 ,ohms ,and ,the ,voltage ,is ,120V ,- ,CORRECT ,ANSWER-12A
The ,_____ ,rotor ,types ,are ,generally ,rugged ,- ,CORRECT ,ANSWER-Squirrel ,cage
The ,componente ,labeled ,7 ,in ,figure ,1 ,is ,a ,(an) ,- ,CORRECT ,ANSWER-End ,seal
Meters ,used ,in ,AC ,circuits ,indicate ,the_______ ,- ,CORRECT ,ANSWER-Effective
Proofs ,tests ,are ,made ,at________ ,oF ,the ,original ,factory ,voltage ,- ,CORRECT
,ANSWER-60%
Which ,type ,of ,heating ,cable ,can ,not ,be ,cut ,and ,terminated ,in ,the ,field? ,-
,CORRECT ,ANSWER-Mineral ,insulated
The ,secondary ,of ,a ,CT ,under ,load ,should ,not ,be ,opened ,because ,of______ ,-
,CORRECT ,ANSWER-Induced ,hight ,voltage
In ,a ,transformer,______ ,- ,CORRECT ,ANSWER-Electromagnetic ,induction ,occurs
When ,a ,ground ,rod ,is ,installed, ,the ,top ,of ,the ,rod ,must ,be ,positioned
,_____.grade ,- ,CORRECT ,ANSWER-Flush ,with ,or ,below
When ,making ,offset ,bends, ,the ,two ,kicks ,must ,be ,made ,perfectly ,parallel ,or
,the ,resulting ,offset ,will ,have ,a ,________ ,- ,CORRECT ,ANSWER-Crooked ,bend
All ,of ,the ,following ,types ,of ,condulet ,may ,be ,used ,as ,a ,pulling ,point ,for
,conduit ,that ,requires ,a ,90 ,degree ,change ,in ,direction, ,except_______ ,-
,CORRECT ,ANSWER-C
To ,be ,effective, ,a ,grounding ,system ,must ,limit ,the ,voltage ,on ,the ,electrical
,system ,and ,protect ,it ,from ,all ,of ,the ,following, ,except ,______ ,- ,CORRECT
,ANSWER-Undervoltage ,conditions
What ,is ,the ,most ,common ,service ,use ,in ,a ,temporary ,power ,panel? ,-
,CORRECT ,ANSWER-120/240 ,volt, ,1-phase, ,3-wire
What ,are ,the ,2 ,most ,common ,types ,of ,overcurrent ,protective ,devices? ,-
,CORRECT ,ANSWER-Circuit ,breakers ,and ,fuses
