Electrical NCCER Test Questions With
Correct Answers
In ba bguardrail bsystem, bthe bguardrails bcan bbe bmade bof bany bof bthe bfollowing
bEXCEPT: b- bcorrect banswers✔✔ropebanding
If bthe bpotential bacross bthe bcircuit bis b48 bvolts band bthe bcurrent bis b5 bamps bthe
bresistance bof bthe bcircuit bis: b- bcorrect banswers✔✔9.6 bohms
A bUL blisted brod btype bgrounding belectrode bmust bhave ba bminimum blength bof: b-
bcorrect banswers✔✔8'
What bis bthe bMINIMUM bnumber bof boverload bsensing bunits brequired bfor ball bthree
bphase bmotors? b- bcorrect banswers✔✔3
In ba bcircuit bof bpure bcapacitance, bthe bcurrent bleads bthe bvoltage bby ban bangle bof: b-
bcorrect banswers✔✔90-degrees
The bstandard bunit bfor ba bmeasuring bthe bcross-sectional barea bof ba bwire bis bthe: b-
bcorrect banswers✔✔circular bmil
The bdrawing bscale bis bMOST blikely bto bbe bfound bin bwhich bof bthe bfollowing bdrawing
blocations? b- bcorrect banswers✔✔the bdrawing blittle bblock
The blength bof ba bbare bcopper bconductor bin ba bground bring bMUST bbe bburied bno
bless bthan b2.5' bbelow bgrade band bwith ba blength bof bat bleast: b- bcorrect
banswers✔✔20 bft.
When binstalling bheating bcables bfor banti-icing bsystems, bcable bpatters bshould bbe bin
ba: b- bcorrect banswers✔✔Serpentine
, An bauxiliary bholding bcontact b(seal-in) bon ba bNEMA bstarter bis bindicated bby bthe
bterminal bmarking: b- bcorrect banswers✔✔A1 b& bA2
The bneutral bbus bin ba bsub bpanel: b- bcorrect banswers✔✔is bbonded
The bPEAK bvoltage bin ba bnominal b120/208 bVAC bsystem bis: b- bcorrect
banswers✔✔208V.
THWN bconductors bhave ban bouter bjacket bmade bof: b- bcorrect banswers✔✔nylon
What bis bshown bon ba bsectional bdrawing? b- bcorrect banswers✔✔Cutaway bview bof ba
bbuilding
Who bis ballowed bto bremove banother belectrician's btag bor block bfrom bany bvalve,
bswitch, bor bpiece bof bequipment bwithout bproper bauthorization? b- bcorrect
banswers✔✔no bone.
The bMAIN bpurpose bof ba brevision bblock bon ban belectrical bdrawing bis bto: b- bcorrect
banswers✔✔note bany bchanges bto bthe boriginal bdrawings
Which bof bthe bfollowing bis bthe bclassified blocation bwhere bcombustible bvapors bare
balways bpresent? b- bcorrect banswers✔✔class bI bDiv bI
With ba brow bof b3-4" bconduits band bsecond brow bof b3-2" band b2-1" bconduits bfor ban
bangle bpull bbox bwhat bis bthe bMINIMUM bdistance bbetween bthe bopposite bwalls bof
bthe bpull bbox? b- bcorrect banswers✔✔32"
Exposed bfield-routed belectrical bconduit bSHOULD bbe binstalled bso bthat bit: b- bcorrect
banswers✔✔is bplumb band blevel
When bwiring bcontrol bpush bbutton bcontrol bcircuit, bthe bauxiliary bholding bcontact
b(seal-in) bis bwired bwith bthe bstart bbutton bin: b- bcorrect banswers✔✔parallel
Ferrous bmetal braceways, bboxes, bfittings, band bsupports bmust bbe bprotected bagainst:
b- bcorrect banswers✔✔corrosion
Which bof bthe bfollowing bfactors bis bused bto bcontrol bthe bspeed bof ban binduction
bmotor? b- bcorrect banswers✔✔Frequency
Electrical bhand btools bthat buse ba bregular b120-volt bsystem bMUST bbe b3-wire
bgrounded bUNLESS bthe: b- bcorrect banswers✔✔tool bis bdouble-insulated band bis
bapproved bby ban bindependent btesting bfacility.
A bconductor bwith b220 bmils bof binsulation bwould bhave binsulation bthickness bof: b-
bcorrect banswers✔✔0.22"
Correct Answers
In ba bguardrail bsystem, bthe bguardrails bcan bbe bmade bof bany bof bthe bfollowing
bEXCEPT: b- bcorrect banswers✔✔ropebanding
If bthe bpotential bacross bthe bcircuit bis b48 bvolts band bthe bcurrent bis b5 bamps bthe
bresistance bof bthe bcircuit bis: b- bcorrect banswers✔✔9.6 bohms
A bUL blisted brod btype bgrounding belectrode bmust bhave ba bminimum blength bof: b-
bcorrect banswers✔✔8'
What bis bthe bMINIMUM bnumber bof boverload bsensing bunits brequired bfor ball bthree
bphase bmotors? b- bcorrect banswers✔✔3
In ba bcircuit bof bpure bcapacitance, bthe bcurrent bleads bthe bvoltage bby ban bangle bof: b-
bcorrect banswers✔✔90-degrees
The bstandard bunit bfor ba bmeasuring bthe bcross-sectional barea bof ba bwire bis bthe: b-
bcorrect banswers✔✔circular bmil
The bdrawing bscale bis bMOST blikely bto bbe bfound bin bwhich bof bthe bfollowing bdrawing
blocations? b- bcorrect banswers✔✔the bdrawing blittle bblock
The blength bof ba bbare bcopper bconductor bin ba bground bring bMUST bbe bburied bno
bless bthan b2.5' bbelow bgrade band bwith ba blength bof bat bleast: b- bcorrect
banswers✔✔20 bft.
When binstalling bheating bcables bfor banti-icing bsystems, bcable bpatters bshould bbe bin
ba: b- bcorrect banswers✔✔Serpentine
, An bauxiliary bholding bcontact b(seal-in) bon ba bNEMA bstarter bis bindicated bby bthe
bterminal bmarking: b- bcorrect banswers✔✔A1 b& bA2
The bneutral bbus bin ba bsub bpanel: b- bcorrect banswers✔✔is bbonded
The bPEAK bvoltage bin ba bnominal b120/208 bVAC bsystem bis: b- bcorrect
banswers✔✔208V.
THWN bconductors bhave ban bouter bjacket bmade bof: b- bcorrect banswers✔✔nylon
What bis bshown bon ba bsectional bdrawing? b- bcorrect banswers✔✔Cutaway bview bof ba
bbuilding
Who bis ballowed bto bremove banother belectrician's btag bor block bfrom bany bvalve,
bswitch, bor bpiece bof bequipment bwithout bproper bauthorization? b- bcorrect
banswers✔✔no bone.
The bMAIN bpurpose bof ba brevision bblock bon ban belectrical bdrawing bis bto: b- bcorrect
banswers✔✔note bany bchanges bto bthe boriginal bdrawings
Which bof bthe bfollowing bis bthe bclassified blocation bwhere bcombustible bvapors bare
balways bpresent? b- bcorrect banswers✔✔class bI bDiv bI
With ba brow bof b3-4" bconduits band bsecond brow bof b3-2" band b2-1" bconduits bfor ban
bangle bpull bbox bwhat bis bthe bMINIMUM bdistance bbetween bthe bopposite bwalls bof
bthe bpull bbox? b- bcorrect banswers✔✔32"
Exposed bfield-routed belectrical bconduit bSHOULD bbe binstalled bso bthat bit: b- bcorrect
banswers✔✔is bplumb band blevel
When bwiring bcontrol bpush bbutton bcontrol bcircuit, bthe bauxiliary bholding bcontact
b(seal-in) bis bwired bwith bthe bstart bbutton bin: b- bcorrect banswers✔✔parallel
Ferrous bmetal braceways, bboxes, bfittings, band bsupports bmust bbe bprotected bagainst:
b- bcorrect banswers✔✔corrosion
Which bof bthe bfollowing bfactors bis bused bto bcontrol bthe bspeed bof ban binduction
bmotor? b- bcorrect banswers✔✔Frequency
Electrical bhand btools bthat buse ba bregular b120-volt bsystem bMUST bbe b3-wire
bgrounded bUNLESS bthe: b- bcorrect banswers✔✔tool bis bdouble-insulated band bis
bapproved bby ban bindependent btesting bfacility.
A bconductor bwith b220 bmils bof binsulation bwould bhave binsulation bthickness bof: b-
bcorrect banswers✔✔0.22"
