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Journeyman Electrician Practice Test With Complete Questions And Answers Rated A
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Journeyman Electrician Practice Test With Complete Questions And Answers Rated A
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Journeyman Electrician Practice TestWith Complete Questions And Answers
Rated A+
Conductors .with ._____ .marked .on .the .insulation .are .NOT .approved .for .use .in .a .wet .l
ocation. .- .Correct . .Answer .- .THHN
conductors .with .THHN .insulation .are .approved .for .use .in .dry .and .damp .locations .onl
y .and .conductors .with .THWN, .THHW, .and .THW .insulation .are .recognized .for .use .in .
dry .and .wet .locations.
Given: .A .one-
family .dwelling .unit .with .a .demand .load .of .200 .amperes .is .supplied .with .a .120/240 .v
olt, .single-
phase, .electrical .system .from .the .local .utility .company. .What .is .the .MINIMUM .size .al
uminum .THW .conductors .required .for .use .as .service-
entrance .conductors .for .this .residence? .- .Correct . .Answer .- .4/0 .AWG
one-family .dwelling .120/240 .volt, .single-phase, .service-
entrance .conductors .to .be .sized .at .an .ampacity .of .not .less .than .83% .of .the .service .r
ating. .Therefore, .200 .amperes .x .83% .= .166 .amperes; .size .4/0 .AWG .THW .aluminum .
conductors .with .an .allowable .ampacity .of .180 .amperes .should .be .selected .for .this .dw
elling.
Where .a .150 .kVA, .single-
phase .transformer .having .a .secondary .voltage .of .120/240 .is .installed .at .a .multi-family
.dwelling, .the .full-load .current .rating, .in .amperes, .of .the .secondary .is ._____. .- .Correct
. .Answer .- .625 .amperes
To .find .the .full-load .current .rating .of .the .single-phase .transformer .apply .the .single-
phase .current .formula .as .shown:I .= .(150 .kVA .x .1000) ./ .240 .volts .= .15,000/240 .= .625
.amperes
Which .one .of .the .following .listed .circuit .breakers .is .NOT .a .standard .ampere .rating? .-
.Correct . .Answer .- .75 .amperes
, the .standard .ampere .ratings .for .fuses .and .circuit .breakers. .A .circuit .breaker .with .an .
ampere .rating .of .75 .amperes .is .not .a .standard .ampere .rating.
The .MINIMUM .length .of .free .conductor .to .be .left .at .each .junction .box .for .the .purpose
.of .splicing .conductors, .or .making .connections .to .illuminares .or .devices .shall .be .____
_ .. .- .Correct . .Answer .- .6 .inches
free .conductor .is .to .be .left .at .each .junction .box .for .splices .or .the .connection .of .lumin
aires .or .devices. .The .intent .of .this .rule .is .to .ensure .enough .conductor .slack .for .the .te
rminal .connections .or .splices .to .be .made .easily.
In .general, .overhead .service-
drop .conductors .shall .NOT .be .smaller .than ._____. .- .Correct . .Answer .- .8 .AWG .coppe
r
overhead .service-
drop .conductors .to .be .not .smaller .than .8 .AWG .copper .or .6 .AWG .aluminum .or .coppe
r-clad .aluminum. .Do .not .get .service-
drop .conductors, .the .overhead .conductors .between .the .utility .electric .supply .system .a
nd .the .service .point, .confused .with .the .service-
entrance .conductors, .the .conductors .from .the .service .point .from .the .utility .company .t
o .the .service .disconnecting .means.
When .a .galvanized .eye-
bolt .is .to .be .used .as .the .point .of .attachment .for .an .electrical .service, .the .NEC .requir
es .the .eye-
bolt .to .be .installed .NOT .less .than ._____ .above .finished .grade. .- .Correct . .Answer .- .1
0 .ft.
provide .adequate .vertical .clearance .of .the .conductors .and .prevent .physical .damage .t
o .the .conductors .and .prevent .persons .from .making .accidental .contact .with .the .condu
ctors .which .may .create .a .shock .hazard .or .electrocution. .In .no .case .shall .the .point .of .
attachment .of .the .service-
drop .conductors .to .be .less .than .10 .ft. .above .finished .grade.
Why .is .electrical .continuity .required .for .metallic .conduit? .- .Correct . .Answer .- .To .estab
lish .an .effective .ground-fault .path .and .facilitate .the .operation .of .the .over-
current .protective .device.
Electrical .continuity .is .required .for .metallic .conduit .to .establish .an .effective .ground-
fault .path .and .facilitate .the .operation .of .the .overcurrent .protective .device.
In .dwelling .units, .receptacle .outlets .installed .for .countertop .surfaces, .must .be .located .
above, .but .NOT .more .than ._____ .above .the .countertop .or .work .surface. .- .Correct . .A
nswer .- .20 .inches
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