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# MCQ in Philippine Electrical Code (PEC) Part 10 | REE Board Exam

This is the Multiple Choice Questions Part 10 of the Series in Philippine Electrical Code (PEC) as one of the Electrical Engineering topic. In Preparation for the REE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electrical Engineering field, Electrical Engineering Books, Journals and other Electrical Engineering References.

#### Continue Practice Exam Test Questions Part 10 of the Series

Choose the letter of the best answer in each questions.

451.ย  Aย  frequencyย  meterย  isย  connectedย  asย  aย  potentialย  device, which is connected across theย  line because of one of the following reasons. Which one is this?

A.ย  A transformer maybe used for different voltages

B.ย  The reading will be independent of the varying current

C.ย  Only the voltage has frequency

D.ย  It is safer than a series device

Solution:

452.ย  Rigidย  non-metallicย  conduitย  approvedย  forย  directย  burial without concrete encasement shall have a minimum burial of _____.

A.ย  500 mm

B.ย  400 mm

C.ย  460 mm

D.ย  440 mm

Solution:

453.ย  All metal parts associated with the hot tub shall be bonded using copper bonding jumper, insulated, covered, or bare, not smaller than _____.

A.ย  5.5 mm2

B.ย  8.0 mm2

C.ย  14.0 mm2

D.ย  3.5 mm2

Solution:

454.ย  Allย  lightingย  fixtures,ย  submersibleย  pumpsย  andย  other submersible equipment used in fountains shall operate at _____ or less between conductors.

A.ย  230 V

B.ย  300 V

C.ย  250 V

D.ย  500 V

Solution:

455.ย  The ground counterpoise when installed in earth shall be placed _____ above all cable in a trench.

A.ย  75 mm

B.ย  100 mm

C.ย  80 mm

D.ย  50 mm

Solution:

456.ย  Type FCC cable shall NOT be used in any of the following EXCEPT

A.ย  outdoors

B.ย  indoors

C.ย  wet locations

D.ย  hazardous locations

Solution:

457.ย  The ampacity of the conductors and the rating or setting of over-currentย  devicesย  inย  aย  circuitย  ofย  aย  solarย  photovoltaic systemย  shallย  NOTย  beย  lessย  thanย  _____ย  ofย  theย  computed current.

A.ย  100 %

B.ย  115 %

C.ย ย ย  125%

D.ย ย ย  130%

Solution:

458.ย  Forย  signallingย  circuitsย  NOTย  exceedingย  _____ย  volts,ย  the current required shall not exceed one ampere.

A.ย  24

B.ย  12

C.ย  30

D.ย  40

Solution:

459.ย  The grounding electrode shall be _____.

A.ย  theย  nearestย  availableย  effectivelyย  groundedย  structural metal member of the structure

B.ย  the nearest available effectively grounded metal water pipe

C.ย  the nearest concrete encased electrode

D.ย  any of these

Solution:

460.ย  Non-metallicย  boxesย  notย  overย  _____ย  cu.ย  cmย  shallย  be permitted only on non-metallic wiring method.

A.ย  1,725

B.ย  1,520

C.ย  1,700

D.ย  1,640

Solution:

461.ย  Theย  equipmentย  bondingย  jumperย  (theย  connectionย  between theย  equipmentย  groundingย  conductorย  andย  theย  grounding impedance) shall be _____.

A.ย  an unspliced conductor run

B.ย  a spliced conductor run

C.ย  either A or B

D.ย  neither A or B

Solution:

462.ย  RME Board April 1995

According to its make, conduits maybe classified as

A.ย  rigid metal

B.ย  rigid non-metal

C.ย  flexible metal

D.ย  all of these

Solution:

463.ย  In no case shall the groundingย  conductor be smaller than _____ copper.

A.ย  5.5 mmยฒ

B.ย  8.0 mmยฒ

C.ย  3.5 mm2

D.ย  2.0 mm2

Solution:

464.ย  Hazardousย  locationย  inย  whichย  flammableย  gasesย  orย  vapors areย  presentย  inย  theย  airย  inย  quantitiesย  sufficientย  toย  produce explosives or ignitable mixtures.

A.ย  Class IV

B.ย  Class III

C.ย  Class II

D.ย  Class I

Solution:

465.ย  The system neutral conductor shall NOT be connected to ground, EXCEPT through the neutral ____.

A.ย  grounding impedance

B.ย  grounding electrode

C.ย  grounding transformer

D.ย  derived from other system

Solution:

466.ย  In damp or wet locations,ย  cabinets and cutout boxes of the surfaceย  typeย  shallย  beย  mountedย  withย  atย  leastย  _____ย  air space between the enclosures and the wall.

A.ย  6.0 mm

B.ย  6.4 mm

C.ย  7.0 mm

D.ย  7.5 mm

Solution:

467.ย  The minimum diameter of a solid air terminal under class I materialย  requirementsย  shallย  beย  ____ย  forย  copperย  ____ย  for aluminum.

A.ย  9.5 mm, 12.7 mm

B.ย  12.7 mm, 9.5 mm

C.ย  8.0 mm, 12.5 mm

D.ย  12.5 mm, 8.0 mm

Solution:

468.ย  Circuitsย  withย  aย  nominalย  voltageย  ofย  600Vย  orย  lessย  inย  aย  rigid metal conduit or intermediate metal conduit and placed in a trench below a 50ย  mm thick concrete or equivalent shall maintain a minimum cover distance of______.

A.ย  150 mm

B.ย  250 mm

C.ย  460 mm

D.ย  300 mm

Solution:

469.ย  RME Board October 1995, REE BOARD October 1993

Verticalย  clearancesย  ofย  allย  serviceย  dropย  conductorsย  above roofs shall NOT be less than one of the following values.

A.ย  2000 mm

B.ย  2750 mm

C.ย  3000 mm

D.ย  2500 mm

Solution:

470.ย  Theย  lightingย  orย  conductorย  groundย  terminalย  shallย  extend vertically NOT less than ______ into the earth.

A.ย  2000 mm

B.ย  3000 mm

C.ย  4000 mm

D.ย  2500 mm

Solution:

471.ย  The circuit supplying an auto-transformer type dimmer shall NOT exceed ______ the between conductors.

A.ย  240 V

B.ย  250 V

C.ย  230 V

D.ย  200 V

Solution:

472.ย  A spark occurring between nearby metallic objects or from such objects to the lighting protection system or to ground.

A.ย  Flashover

B.ย  Side flash

C.ย  Spark over

D.ย  Discharge

Solution:

473.ย  Coversย  forย  boxesย  shallย  beย  permanentlyย  marked.ย  The marking shall be on the outside of the box using the block type letters at least ______ in height.

A.ย  10 mm

B.ย  12 mm

C.ย  15 mm

D.ย  20 mm

Solution:

474.ย  RME Board October 1995

Whenย  wiringย  aย  racewayย  atย  leastย  aย  certainย  lengthย  ofย  free conductorsย  shallย  beย  leftย  atย  eachย  outlet.ย  Whatย  isย  the minimum length?

A.ย  75 mm

B.ย  100 mm

C.ย  150 mm

D.ย  200 mm

Solution:

475.ย  Whereย  aย  rigidย  metalย  conduitย  isย  used,ย  thereย  shallย  NOTย  be more than the equivalent ofย  ____ย  quarter bends between pull points.

A.ย  three

B.ย  four

C.ย  five

D.ย  two

Solution:

476.ย  Thereย  shallย  beย  atย  leastย  _____ย  downย  conductor(s)ย  onย  a heavy-duty smoke or vent stacks.

A.ย  one

B.ย  two

C.ย  three

D.ย  four

Solution:

477.ย  If the setting of the over current device in a circuit ahead of the equipment is 60A, theย  minimum equipment grounding conductor using copper shall be _____.

A.ย  5.5 mmยฒ

B.ย  3.5 mmยฒ

C.ย  2.0 mm2

D.ย  8.0 mmยฒ

Solution:

478.ย  An exposed wiring support system using a messenger wire to support insulated conductors.

B.ย  Concealed knob and tube wiring

C.ย  Messenger cable wiring

D.ย  Messenger supported wiring

Solution:

479.ย  Air terminal shall be withinย  ____ of outermost projection of roof edge.

A.ย  700 mm

B.ย  760 mm

C.ย  800 mm

D.ย  600 mm

Solution:

480.ย  Inย  replacingย  aย  bustedย  fuseย  whichย  ofย  theย  followingย  is important?

A.ย  same size and type

B.ย  same size but different rating

C.ย  same type but different rating

D.ย  different size and type

Solution:

481.ย  RME Board April 1994

Which of the following wires has 75-ohm impedance?

B.ย  Coaxial

D.ย  None of these

Solution:

482.ย  Rigid metal conduit shall ship in standard lengths of ____.

A.ย  3000 mm

B.ย  6000 mm

C.ย  4000 mm

D.ย  5000 mm

Solution:

483.ย  RME Board April 1995

The term given to an insulated standard wire

A.ย  Durability

B.ย  Cord

C.ย  Length

D.ย  Volume

Solution:

484.ย  Exposedย  non-currentย  carryingย  metalย  partsย  ofย  fixed equipmentย  likelyย  toย  becomeย  energizedย  shallย  beย  grounded underย  theย  followingย  conditions.ย  Whichย  oneย  isย  NOT included?

A.ย  where located in wet or damp locations

B.ย  where in electrical contact with wooden floor

C.ย  where in a classified hazardous locations

D.ย  whereย  suppliedย  withย  aย  metal racewayย  orย  otherย  wiring methods

Solution:

485.ย  Electrical equipment except x-ray tube inside anesthetizing room shall be located at least ____ above the floor.

A.ย  2000 mm

B.ย  2500 mm

C.ย  2400 mm

D.ย  2300 mm

Solution:

486.ย  Whereย  theย  distanceย  requirementย  inย  makingย  holesย  cannot beย  maintained,ย  theย  cableย  orย  racewayย  shallย  beย  protected fromย  penetrationย  byย  screwsย  orย  nailsย  byย  aย  steelย  plateย  or bushing at leastย  ____ย  thick and of approved length and a width to cover the area of the wiring.

A.ย  2.0 mm

B.ย  1.5 mm

C.ย  1.8 mm

D.ย  1.6 mm

Solution:

487.ย  Theย  entireย  areaย  ofย  theย  aircraftย  hangar,ย  includingย  any adjacent communication areas not suitably cut-off from the hangarย  shallย  beย  classifiedย  asย  hazardousย  upย  toย  aย  levelย  of ____ above the floor.

A.ย  400 mm

B.ย  460 mm

C.ย  500 mm

D.ย  480 mm

Solution:

488.ย  RME Board April 1996

In which method of starting a motor is the starting current a minimum?

A.ย  star-delta

B.ย  starter-rotor starter

C.ย  direct on line

D.ย  autotransformer

Solution:

489.ย  All switches and circuit breakers used as switches shall be soย  installedย  thatย  theย  centerย  ofย  theย  gripย  ofย  theย  operating handleย  whenย  inย  itsย  highestย  positionย  shallย  NOTย  beย  more than ____ above the floor or working flat form.

A.ย  2000 mm

B.ย  1800 mm

C.ย  1500 mm

D.ย  2100 mm

Solution:

490.ย  For straight pulls, the length of the pull box shall NOT be lessย  thanย  ____ย  timesย  theย  outsideย  diameterย  ofย  theย  largest non-shielded conductor or cable.

A.ย  42

B.ย  48

C.ย  32

D.ย  30

Solution:

491.ย  Aluminum electrode ____ permitted to be used.

A.ย  shall not be

B.ย  shall be

C.ย  either A or B

D.ย  neither A or B

Solution:

492.ย  Electrical non-metallic tubing shall be clearly and durably marked at least every

A.ย  2000 mm

B.ย  1000 mm

C.ย  3000 mm

D.ย  1500 mm

Solution:

493.ย  Which of the following sizes of fuse NOT standard?

A.ย  80 A

B.ย  45 A

C.ย  125 A

D.ย  75 A

Solution:

494.ย  RME Board April 1996

Theย  Philippineย  Electricalย  Code,ย  Partย  1ย  doesย  notย  cover wiring of equipment installed within or to or from one of the following. Which one is this?

A.ย  Trailers

B.ย  Mobile homes

C.ย  Water crafts

D.ย  Airplanes

Solution:

495.ย  Theย  smallestย  electricalย  tradeย  sizeย  ofย  intermediateย  metal conduit.

A.ย  15 mm

B.ย  20 mm

C.ย  12 mm

D.ย  25 mm

Solution:

496.ย  Theย  useย  ofย  electricalย  metallicย  tubingย  shallย  beย  permitted for_____.

A.ย  exposed worksย  C.ย  both A and B

B.ย  concealed works

C.ย  both A and B

D.ย  neither A or B

Solution:

497.ย  Theย  zoneย  ofย  protectionย  ofย  anย  overheadย  groundย  wireย  is conventionally taken as a

A.ย  cone

B.ย  cylinder

C.ย  triangular prism

D.ย  all of these

Solution:

498.ย  Theย  minimumย  spacingย  betweenย  bareย  metalย  partsย  of oppositeย  polarityย  whereย  mountedย  onย  theย  sameย  surface shall be ____ for voltages rated not over 250V nominal.

A.ย  26 mm

B.ย  32 mm

C.ย  30 mm

D.ย  28 mm

Solution:

499.ย  Theย  maximumย  electricalย  tradeย  sizeย  ofย  flexibleย  metallic tubing shall be ____.

A.ย  15 mm

B.ย  20 mm

C.ย  32 mm

D.ย  100 mm

Solution:

500.ย  Aย  protectedย  deviceย  forย  limitingย  surgeย  voltageย  by discharging or by passing surge current.

A.ย  Arrester

B.ย  Circuit breaker

C.ย  Lighting rod

D.ย  Thermocouple

Solution:

#### Questions and Answers in Philippine Electrical Code

Following is the list of practice exam test questions in this brand new series:

MCQ in Philippine Electrical Code
PART 1: MCQ from Number 1 โ 50                Answer key: included
PART 2: MCQ from Number 51 โ 100            Answer key: included
PART 3: MCQ from Number 101 โ 150           Answer key: included
PART 4: MCQ from Number 151 โ 200           Answer key: included
PART 5: MCQ from Number 201 โ 250           Answer key: included
PART 6: MCQ from Number 251 โ 300           Answer key: included
PART 7: MCQ from Number 301 โ 350           Answer key: included
PART 8: MCQ from Number 351 โ 400            Answer key: included
PART 9: MCQ from Number 401 โ 450            Answer key: included
PART 10: MCQ from Number 451 โ 500          Answer key: included

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