ELECTRICAL NCCER STUDY SET
QUESTIONS WITH CORRECT ANSWERS
article b250 b- bcorrect banswers✔✔Which barticle bof bthe bNEC bcovers bgrounding?
Gual b- bcorrect banswers✔✔Which bof bthe bfollowing bis ba b90 bdegree, bexplosion bproof
bfitting?
Dropout bplate b- bcorrect banswers✔✔What bis ba bMetal bplate bwith ba bcurved bsurface
bfor bcable bto bfollow bas bit bpasses bfrom bthe btray?
372/575 b3-phase, b4-wire b- bcorrect banswers✔✔Are bnot bcommon bservice bvoltages
bin bthe bUnited bStates
GFCI bbreaker b- bcorrect banswers✔✔Opens ba bcircuit bto bprevent boperation bof ban
belectrical bdevice
The bmotor bwill bautomatically bblow bfuses b- bcorrect banswers✔✔What bwill bhappen
bwhen bone bor bmore bcoils bin ba bwinding bare bgrounded b?
13.3 bamps b- bcorrect banswers✔✔Eight bincandescent blighting bfixtures bare bto bbe
binstalled b. bEach bfixture bis b120 bvolts, bwith ba b200-watt blamp. bWhat bis bthe btotal
bconnected bload?
Neutral bbusbar b- bcorrect banswers✔✔The b——- bmust bbe bgrounded bin ba bbussed
bgutter bif bused bas bthe bmain bservice bequipment.
Strong benough bto bsupport bthe btray bsystem b- bcorrect banswers✔✔When bwall
bmounting bcable btray, bensure bthat bthe bbuilding bstructure bis b?
Keep bmoisture bfrom bcreeping bin b- bcorrect banswers✔✔The bpurpose bof bsealing
bcable bends bwhen breels bof bcable bare bin bstorage bis bto
,A bmoisture bseal b- bcorrect banswers✔✔The bouter bcovering bon bliquid-tight bflexible
bmetal bconduit bis bused bfor
Mechanically band belectrically bsecure b- bcorrect banswers✔✔A bgood belectrical
bconnection bshould bbe
A bcircle bwith btwo bparallel blines bdrawn bthrough bit b- bcorrect banswers✔✔The bsymbol
bnormally bused bfor bduplex
NEC bsection b110-22 b- bcorrect banswers✔✔Disconnecting bmeans bare bcovered bin?
Number bof binternal boperations bthat ba bswitch bcan bpreform b- bcorrect banswers✔✔In
brelation bto bswitches bthe bterm bthrow brefers bto
3 b- bcorrect banswers✔✔A b3-phase, b4-wire, b480v bservice brequires_______ bcurrent
btransformers.
NEC barticle b230 b- bcorrect banswers✔✔Services bconductors band bequipment bare
bcovered bin
Grounding b- bcorrect banswers✔✔The bNEC brequires bthat ball breceptacles binstalled
bon b25
Cross-sectional barea bof bthe bwite b- bcorrect banswers✔✔The bcircular bmil bis bbased
bon bthe b_______.
Cross-sectional barea bof bthe bwire b- bcorrect banswers✔✔The bcircular bmil bis bbased
bon bthe b_______?
Step bdown bturn bratio bof b4:3 b- bcorrect banswers✔✔A btransformer bwith bthe bprimary
bof b400 bturns band ba bsecondary bof b300 bturns bhas ba?
Class b1 b- bcorrect banswers✔✔Of bthe btermination bclasses blisted bbelow,______ bis
bthe bonly bone bthat bprovides ba bseal bagainst bexternal belements
RMS b(Root bMean bSquare) b- bcorrect banswers✔✔Unless bother bwise bnoted, bthe
bcalculations bin bAC bcircuits______ bvalues.
Induced bvoltage bis bincreased b- bcorrect banswers✔✔When bthe bcoil bturns bare
bincreased bthe b___________.
Resistance bof bthe bpolymeric bcore bincreases b- bcorrect banswers✔✔As bthe
btemperature bsurrounding ba bself-regulating bheating bcable brises, bthe b_________>
Capacitor-start b- bcorrect banswers✔✔The bmotor btype bthat bhas bthe bhighest bstarting
btorque bis bthe b_______ bmotor.
, frequancy b- bcorrect banswers✔✔For ba bgiven bnumber bof bpoles, bthe b_______
bdetermines bthe bspeed bof ban bac bmotor.
Magnetic b- bcorrect banswers✔✔Both binduction band bsynchronous bmotors boperate bon
bthe bprinciple bof ba brotating________ bfield.
90 bvolts b- bcorrect banswers✔✔A btransformer bhas b200 bturns bin bthe bprimary, b150
bturns bin bthe bsecondary band ba b120VAC bapplied bto bthe bprimary. bThe bvoltage
bacross bthe bsecondary bis?
Horse bpower b- bcorrect banswers✔✔The boutput bcapacity bof ba bmotor bis brated bin?
1800 b- bcorrect banswers✔✔The bsynchronous bspeed bat bwhich ba b4 bpole, b60 bHz
binduction bmotor boperates bis b______ brpm.
0 b- bcorrect banswers✔✔The bsine bof b0 bdegrees bis b?
12 bamps b- bcorrect banswers✔✔In bAna bAC bcircuit bcontaining bresistance
bonly,_______ bwill bflow bif bthe bresistance bis b10 bohms band bthe bvoltage bis b120v
Squirrel bcage b- bcorrect banswers✔✔The_____ brotor btypes bare bgenerally brugged.
effectivness b- bcorrect banswers✔✔Meters bused bin bAC bcircuits bindicate bthe
b_______.
60% b- bcorrect banswers✔✔Proofs btests bare bmade bat b________ bof bthe boriginal
bfactory bvoltage.
Mineral binsulated b- bcorrect banswers✔✔Which btype bof bheating bcable bcannot bbe bcut
band bterminated bin bthe bfield?
Induce bhigh bvoltage b- bcorrect banswers✔✔The bsecondary bof ba bCT bunder bload
bshould bnot bbe ba bopened bbecause bof?
Electromagnetic binduction boccurs b- bcorrect banswers✔✔In ba btransformer,_______.
Flush bwith bor bbelow b- bcorrect banswers✔✔When ba bground brod bis binstalled, bthe btop
bof bthe brod bmust bbe bpositioned b________ bgrade.
Crooked bbend b- bcorrect banswers✔✔When bmaking boffset bbends, bthe btwo bkicks
bmust bbe bmade bperfectly bparallel bor bthe bresulting boffset bwill bhave ba b_____.
undervoltage bconditions b- bcorrect banswers✔✔To bbe beffective, ba bgrounding bsystem
bmust blimit bthe bvoltage bon bthe belectrical bsystem band bprotect bit bfrom ball bof bthe
bfollowing, bexcept______
QUESTIONS WITH CORRECT ANSWERS
article b250 b- bcorrect banswers✔✔Which barticle bof bthe bNEC bcovers bgrounding?
Gual b- bcorrect banswers✔✔Which bof bthe bfollowing bis ba b90 bdegree, bexplosion bproof
bfitting?
Dropout bplate b- bcorrect banswers✔✔What bis ba bMetal bplate bwith ba bcurved bsurface
bfor bcable bto bfollow bas bit bpasses bfrom bthe btray?
372/575 b3-phase, b4-wire b- bcorrect banswers✔✔Are bnot bcommon bservice bvoltages
bin bthe bUnited bStates
GFCI bbreaker b- bcorrect banswers✔✔Opens ba bcircuit bto bprevent boperation bof ban
belectrical bdevice
The bmotor bwill bautomatically bblow bfuses b- bcorrect banswers✔✔What bwill bhappen
bwhen bone bor bmore bcoils bin ba bwinding bare bgrounded b?
13.3 bamps b- bcorrect banswers✔✔Eight bincandescent blighting bfixtures bare bto bbe
binstalled b. bEach bfixture bis b120 bvolts, bwith ba b200-watt blamp. bWhat bis bthe btotal
bconnected bload?
Neutral bbusbar b- bcorrect banswers✔✔The b——- bmust bbe bgrounded bin ba bbussed
bgutter bif bused bas bthe bmain bservice bequipment.
Strong benough bto bsupport bthe btray bsystem b- bcorrect banswers✔✔When bwall
bmounting bcable btray, bensure bthat bthe bbuilding bstructure bis b?
Keep bmoisture bfrom bcreeping bin b- bcorrect banswers✔✔The bpurpose bof bsealing
bcable bends bwhen breels bof bcable bare bin bstorage bis bto
,A bmoisture bseal b- bcorrect banswers✔✔The bouter bcovering bon bliquid-tight bflexible
bmetal bconduit bis bused bfor
Mechanically band belectrically bsecure b- bcorrect banswers✔✔A bgood belectrical
bconnection bshould bbe
A bcircle bwith btwo bparallel blines bdrawn bthrough bit b- bcorrect banswers✔✔The bsymbol
bnormally bused bfor bduplex
NEC bsection b110-22 b- bcorrect banswers✔✔Disconnecting bmeans bare bcovered bin?
Number bof binternal boperations bthat ba bswitch bcan bpreform b- bcorrect banswers✔✔In
brelation bto bswitches bthe bterm bthrow brefers bto
3 b- bcorrect banswers✔✔A b3-phase, b4-wire, b480v bservice brequires_______ bcurrent
btransformers.
NEC barticle b230 b- bcorrect banswers✔✔Services bconductors band bequipment bare
bcovered bin
Grounding b- bcorrect banswers✔✔The bNEC brequires bthat ball breceptacles binstalled
bon b25
Cross-sectional barea bof bthe bwite b- bcorrect banswers✔✔The bcircular bmil bis bbased
bon bthe b_______.
Cross-sectional barea bof bthe bwire b- bcorrect banswers✔✔The bcircular bmil bis bbased
bon bthe b_______?
Step bdown bturn bratio bof b4:3 b- bcorrect banswers✔✔A btransformer bwith bthe bprimary
bof b400 bturns band ba bsecondary bof b300 bturns bhas ba?
Class b1 b- bcorrect banswers✔✔Of bthe btermination bclasses blisted bbelow,______ bis
bthe bonly bone bthat bprovides ba bseal bagainst bexternal belements
RMS b(Root bMean bSquare) b- bcorrect banswers✔✔Unless bother bwise bnoted, bthe
bcalculations bin bAC bcircuits______ bvalues.
Induced bvoltage bis bincreased b- bcorrect banswers✔✔When bthe bcoil bturns bare
bincreased bthe b___________.
Resistance bof bthe bpolymeric bcore bincreases b- bcorrect banswers✔✔As bthe
btemperature bsurrounding ba bself-regulating bheating bcable brises, bthe b_________>
Capacitor-start b- bcorrect banswers✔✔The bmotor btype bthat bhas bthe bhighest bstarting
btorque bis bthe b_______ bmotor.
, frequancy b- bcorrect banswers✔✔For ba bgiven bnumber bof bpoles, bthe b_______
bdetermines bthe bspeed bof ban bac bmotor.
Magnetic b- bcorrect banswers✔✔Both binduction band bsynchronous bmotors boperate bon
bthe bprinciple bof ba brotating________ bfield.
90 bvolts b- bcorrect banswers✔✔A btransformer bhas b200 bturns bin bthe bprimary, b150
bturns bin bthe bsecondary band ba b120VAC bapplied bto bthe bprimary. bThe bvoltage
bacross bthe bsecondary bis?
Horse bpower b- bcorrect banswers✔✔The boutput bcapacity bof ba bmotor bis brated bin?
1800 b- bcorrect banswers✔✔The bsynchronous bspeed bat bwhich ba b4 bpole, b60 bHz
binduction bmotor boperates bis b______ brpm.
0 b- bcorrect banswers✔✔The bsine bof b0 bdegrees bis b?
12 bamps b- bcorrect banswers✔✔In bAna bAC bcircuit bcontaining bresistance
bonly,_______ bwill bflow bif bthe bresistance bis b10 bohms band bthe bvoltage bis b120v
Squirrel bcage b- bcorrect banswers✔✔The_____ brotor btypes bare bgenerally brugged.
effectivness b- bcorrect banswers✔✔Meters bused bin bAC bcircuits bindicate bthe
b_______.
60% b- bcorrect banswers✔✔Proofs btests bare bmade bat b________ bof bthe boriginal
bfactory bvoltage.
Mineral binsulated b- bcorrect banswers✔✔Which btype bof bheating bcable bcannot bbe bcut
band bterminated bin bthe bfield?
Induce bhigh bvoltage b- bcorrect banswers✔✔The bsecondary bof ba bCT bunder bload
bshould bnot bbe ba bopened bbecause bof?
Electromagnetic binduction boccurs b- bcorrect banswers✔✔In ba btransformer,_______.
Flush bwith bor bbelow b- bcorrect banswers✔✔When ba bground brod bis binstalled, bthe btop
bof bthe brod bmust bbe bpositioned b________ bgrade.
Crooked bbend b- bcorrect banswers✔✔When bmaking boffset bbends, bthe btwo bkicks
bmust bbe bmade bperfectly bparallel bor bthe bresulting boffset bwill bhave ba b_____.
undervoltage bconditions b- bcorrect banswers✔✔To bbe beffective, ba bgrounding bsystem
bmust blimit bthe bvoltage bon bthe belectrical bsystem band bprotect bit bfrom ball bof bthe
bfollowing, bexcept______
