Electrician NCCER (2025) Actual Exam
Questions and Answers A+ Graded
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-whatt .lamp .what .is .the .total .connected .load? .- .CORRECT .ANSWER-
13.3 .Amps
The .__________must .be .grounded .in .a .bussed .glutter .if .use .as .the .main
.service .equipmemt .- .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 .use .for .- .CORRECT
.ANSWER-A .moisture .seal
A .good .electrical .connection .should .- .CORRECT .ANSWER-Be .mechanically .and
.electrically .secure
The .symbol .normally .use .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
What .instrument .is .use .to .perform .an .insulation .resistance .test .on .a .480 .volt
.motor .winding? .- .CORRECT .ANSWER-Megohmmeter
What .is .a .seal .installed .in .a .run .of .conduit .in .a .class .I .location? .- .CORRECT
.ANSWER-Prevent .the .passage .of .explosive .gases .in .the .conduit
Questions and Answers A+ Graded
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-whatt .lamp .what .is .the .total .connected .load? .- .CORRECT .ANSWER-
13.3 .Amps
The .__________must .be .grounded .in .a .bussed .glutter .if .use .as .the .main
.service .equipmemt .- .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 .use .for .- .CORRECT
.ANSWER-A .moisture .seal
A .good .electrical .connection .should .- .CORRECT .ANSWER-Be .mechanically .and
.electrically .secure
The .symbol .normally .use .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
What .instrument .is .use .to .perform .an .insulation .resistance .test .on .a .480 .volt
.motor .winding? .- .CORRECT .ANSWER-Megohmmeter
What .is .a .seal .installed .in .a .run .of .conduit .in .a .class .I .location? .- .CORRECT
.ANSWER-Prevent .the .passage .of .explosive .gases .in .the .conduit
