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NCCER FINAL TEST QUESTIONS WITH
COMPLETE SOLUTIONS
Which |of |the |following |BEST |describes |where |the |type |and |size |of |overcurrent | protection |is |found? |- |CORRECT |ANSWER✔✔-Floor |plans Electrical |charges |are |measured |in: |- |CORRECT |ANSWER✔✔-coulombs When |installing |cables |smaller |than |4/0 |in |a |cable |tray, |the |allowable |cable |fill | area |must |NOT |be |less |than |- |CORRECT |ANSWER✔✔-cross-sectional |areas What |is |the |purpose |of |a |lockout |tag-out |system? |- |CORRECT |ANSWER✔✔-to | prevent |unexpected |energizing |of |equipment |or |systems Time |delay |fuses |are |most |commonly |used |in |circuits |subject |to |what |type |of | current? |- |CORRECT |ANSWER✔✔-Surge A |drawing |that |shows |the |heights |of |an |object, |but |not |the |depth |is |a(n) |- | CORRECT |ANSWER✔✔-elevation |drawing The |outer |covering |on |liquid-tight |flexible |metal |conduit |is |used |for |- |CORRECT |ANSWER✔✔-a |moisture |seal A |conductor |with | 220 |mils |of |insulation |would |have |insulation |thickness |of: |- | CORRECT |ANSWER✔✔-0.22" All |of |the |following |ratings |appear |on |a |circuit |breaker |nameplate |Except: |- | CORRECT |ANSWER✔✔-rated |wattage
What |is |a |dropout |plate? |- |CORRECT |ANSWER✔✔-metal |plate |with |a |curved | surface |to |protect |the |cable |as |it |enters IEC |style |contact |or |coil |are |marked |with |the |labels: |- |CORRECT |ANSWER✔✔-T |& |T An |insulated |type | 600 |volt |crimp |terminal |for |a |16-14 |AWG |is |typically | identified |by |which |color |- |CORRECT |ANSWER✔✔-Blue Which |of |the |following |statements |about |a |service |neutral |conductor |is |TRUE? |- |CORRECT |ANSWER✔✔-it |may |be |smaller |than |the |ungrounded |conductors Which |electrical |values |CANNOT |be |tested |using |a |VOM? |- |CORRECT | ANSWER✔✔-Watts What |is |the |voltage |drop |for |a |#8 |(16,510 |cmil) |copper |wire |at |120V, |250ft |one |way |and |load |of | 39 |amps? |- |CORRECT |ANSWER✔✔-10. Which |type |of |transformer |has |its |windings |connected |in |series? |- |CORRECT | ANSWER✔✔-a |delta |transformer What |is |insulating |tape? |- |CORRECT |ANSWER✔✔-nonconductive |adhesive | tape? A |conduit |brush |or |conduit |swap |is |used |to |do |what? |- |CORRECT |ANSWER✔✔- remove |water, |sand, |debris |and |other |light |obstruction |from |the |interior |of |the | conduit
What |is |the |symbol |for |the |secondary |side |of |a |transformer? |- |CORRECT | ANSWER✔✔-X What |type |of |conduit |can |be |safely |used |in |a |corrosive |environment? |- | CORRECT |ANSWER✔✔-plastic |coated |RMC |galvanized |steel A |type |"X" |conduit |body |has |how |many |conduit |entries? |- |CORRECT | ANSWER✔✔- Wire |connectors |labeled |with |only |the |wire |size |should |ONLY |be |used |with |what |type |of |conductors? |- |CORRECT |ANSWER✔✔-Copper When |setting |a |circuit |breaker, |where |should |the |worker |stant? |- |CORRECT | ANSWER✔✔-to |the |side A |UL |listed |rod |type |grounding |electrode |must |have |a |minimum |length |of: |- | CORRECT |ANSWER✔✔-8" An |electrician |that |attempts |to |install |or |remove |energized |fuses |will |be | exposed |to |the |risk |of |an |electrical |shock |and |an |electrical |- |CORRECT | ANSWER✔✔-surge When |installing |heating |cables |for |anti-icing |systems, |the |cable |patron |should | be |in: |- |CORRECT |ANSWER✔✔-serpentine The |most |common |transformer |found |on |an |industrial |site |is: |- |CORRECT | ANSWER✔✔-three |phase |delta-wye How |does |a |battery |produce |voltage? |- |CORRECT |ANSWER✔✔-chemical | reaction
What |type |of |NEMA |class |enclosures |is |approved |for |general |purpose |indoor | use |and |is |NOT |dust-tight |or |drip-proof |- |CORRECT |ANSWER✔✔-Type-I Why |should |the |test |leads |of |a |"megger" |NEVER |be |touched |by |anyone |when | in |use |- |CORRECT |ANSWER✔✔-it |could |result |in |an |electrical |shock What |will |be |the |center |to |center |measurement |for |two |30-degree |bends |in |an | offset |bend |with |a |height |of | 18 |inches |- |CORRECT |ANSWER✔✔-9" All |of |the |following |are |acceptable |grounding |electrodes |for |a |service | grounding |electrode |system |EXCEPT |- |CORRECT |ANSWER✔✔-an |underground | metal |gas |pipe |with |at |least | 10 |ft |direct |contact |with |earth An |auxiliary |holding |contact |(seal-in) |on |a |typical |NEMA |starter |is |indicated |by | the |terminal |marking |- |CORRECT |ANSWER✔✔-AI |& |A The |main |purpose |of |revision |block |on |an |electrical |drawing |is |to |- |CORRECT | ANSWER✔✔-note |any |changes |to |the |original |drawings Which |of |the |following |category |ratings |would |a |meter |need |to |have |to |take | voltage |readings |at |the |service |switchgear |of |an |industrial |facility |- |CORRECT | ANSWER✔✔-Cat |III What |is |the |system |grounding |electrodes |interconnected |by |grounding | conductors |that |are |buried |in |the |earth |to |provide |lower |resistance? |- | CORRECT |ANSWER✔✔-ground |grid Which |of |the |following |is |NOT |a |reason |why |electrical |systems |must |be | grounded |- |CORRECT |ANSWER✔✔-Limit |the |potential |between |ungrounded | conductors
Percent |slip |of |an |induction |motor |refers |to |the: |- |CORRECT |ANSWER✔✔-ratio | of |synchronous |speed |to |rotor |speed |of |the |motor To |separate |or |isolate |electrical |circuits |in |a |cable |tray |systems, |use |- | CORRECT |ANSWER✔✔-barrier |strips The |potential |across |the |circuit |is |480V |and |the |current |is | 50 |amps. |What |is | the |resistance |of |the |circuit? |- |CORRECT |ANSWER✔✔-9.6 |ohms For |a |given |number |of |poles, |what |determines |the |speed |of |an |AC |motor? |- | CORRECT |ANSWER✔✔-Frequency The |NEC |allows |copper |busbars |to |carry | 1000 |amps |per |square |inch. |If |a |bus | bar |measures |1/4" |x |2". |How |many |amps |is |this |bar |allowed |to |carry? |- | CORRECT |ANSWER✔✔- On |a |push |button, |normally |opens |contact |generally |are |used |to |close |the | circuit |when |press |to |- |CORRECT |ANSWER✔✔-initiate |a |start |on |a |circuit | function AS |the |mechanical |load |increases |on |a |squirrel |cage |induction |motor: |- | CORRECT |ANSWER✔✔-Torque |increases |and |stator |current |increases A |swivel |joint |connection |is |to |be |made |in |a |cable |tray |installation. |What |must | be |installed? |- |CORRECT |ANSWER✔✔-A |flexible |bonding |jumper Insulation |on |the |barrel |of |crimp |connectors |for |wires |sized |22-16 |AWG |are | typically |colored: |- |CORRECT |ANSWER✔✔-red If |a | 90 |degree |stub |to |be |bend |is |using | 15 |degree |segments. |How |many |bends | are |required |- |CORRECT |ANSWER✔✔-
What |is |the |type |USE |cable |PRIMARILY |used |for? |- |CORRECT |ANSWER✔✔- Direct |burial |on |earth What |is |the |multiplier |for |calculating |a |45-degree |offset |when |conduit |is |being | bent? |- |CORRECT |ANSWER✔✔-1. An |assembly |containing |two |or |more |insulated |conductors |and |having |an | overall |jacket |is |known |as: |- |CORRECT |ANSWER✔✔-cable What |is |the |purpose |of |sealing |cable |ends |that |are |in |storage? |- |CORRECT | ANSWER✔✔-to |keep |moisture |from |entering |it The |wattage |output |of |series |resistance |heating |cables |depends |on |the |total | circuit |length |and |- |CORRECT |ANSWER✔✔-resistance All |power |tools |used |for |construction |and |maintenance |shall |be |grounded | UNLESS |they |are |- |CORRECT |ANSWER✔✔-double |insulated What |is |the |PRIMARY |consideration |in |selecting |the |rope |type |for |a |cable |pull? |- |CORRECT |ANSWER✔✔-low |stretch The |type |of |mounting |used |for |lightning |fixtures |is |indicated |in |the |- |CORRECT | ANSWER✔✔-lightning |fixtures |specifications Which |type |of |transformer |core |assembly |offers |low |resistance |to |magnetic | lines |of |force? |- |CORRECT |ANSWER✔✔-Iron
The |turns |ratio |of |a |3-phase |13.8kV |transformer |is | 115 |to |1. |What |is |the |output |voltage |of |the |secondary? |- |CORRECT |ANSWER✔✔-120 |volts In |an |AC |circuit |the |total |opposition |to |the |flow |of |current |is |termed |- |CORRECT | ANSWER✔✔-impendance the |PEAK |voltage |in |a |nominal |120/208 |VAC |system |is: |- |CORRECT | ANSWER✔✔-208 |volts The |conducting |object |through |which |a |direct |connection |to |earth |is | established |is |called |a |grounding: |- |CORRECT |ANSWER✔✔-electrode With |a |circuit |of |a |lagging |power |factor |of |0.5, |What |should |be |done? |- | CORRECT |ANSWER✔✔-Add |a |capacitor |to |increase |the |power |factor A |lightning |outlet |symbol |in |the |shape |of |a |circle |indicates |a(n) |- |CORRECT | ANSWER✔✔-incandescent |fixture A |voltage |source |of |a |circuit |provides | 240 |volts |and |draws | 48 |amps. |How |much |resistance |is |in |the |circuit? |- |CORRECT |ANSWER✔✔-5 |ohms Which |type |of |conductors |has |the |highest |temperature |rating? |- |CORRECT | ANSWER✔✔-THHW- When |wiring |a |3-wire |control |push |button |control |circuit, |the |auxiliary |holding | contact |(seal-in) |is |wired |with |the |start |button |in: |- |CORRECT |ANSWER✔✔- parallel The |AIC |ratings |of |an |overcurrent |protection |device |represents |its |- |CORRECT | ANSWER✔✔-MAXIMUM |fault |current |the |device |will |interrupt
Which |of |these |is |used |as |a |guide |to |assist |cables |entering |a |conduit? |- | CORRECT |ANSWER✔✔-sheave Which |of |the |following |is |the |classified |location |where |combustible |vapors |may |be |present? |- |CORRECT |ANSWER✔✔-Class |I, |Div |II A |protective |device |for |limiting |voltage |spikes |by |discharging |or |bypassing | surge |current |is |called |a: |- |CORRECT |ANSWER✔✔-surge |protector The |cover |of |a |de-energized |motor |starter |is |opened. |What |is |the |first |step |in | the |inspection? |- |CORRECT |ANSWER✔✔-verify |it |is |de-energized What |is |the |name |of |the |connecting |device |shown |in |the |diagram? |- |CORRECT | ANSWER✔✔-Split-bolt Which |contacts |are |closed |in |the |run |mode? |- |CORRECT |ANSWER✔✔-
