Question Bank 1 (PEC-selected)

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Author:
Camskie
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304881
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Question Bank 1 (PEC-selected)
Updated:
2015-08-03 08:54:50
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camille
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Question Bank - PEC
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  1. Which of the following conductor sizes has the highest resistance?

    a. 3.5mm2
    b. 8.0mm2
    c. 2.0mm2
    d. 5.5mm2
    2.0mm2
  2. What is the allowable ampacity of THW insulated copper conductor with an area of 8.0mm2 and exposed to an ambient temperature of 30oC?
    45A
  3. When computing the service load, more than three fixed appliances are computed with a demand factor of ___ of the nameplate rating?
    75%
  4. If the project is extensive and requires more time for checking and for computations of fees, the issuance of the electrical permit need not to be issued immediately. However, the delay shall not be longer than how many working days?
    5
  5. Splices in ground conductors shall be as few as practicable and shall be attached so as to withstand a pull test of ____.
    890N
  6. If there are three wires of 150mm2 connected to one terminal entering a cabinet or a switchboard, the bending space at each terminal shall NOT be less than ___, provided the conductors do not enter or leave the enclosure through the wall opposite its terminals.
    250mm
  7. For an ambient temperature of 30oC, a THW insulated copper with a cross sectional area of 3.5mm2 and buried underground has the following ampacity. Which one is correct?

    a. 20A
    b. 40A
    c. 15A
    d. 30A
    30A
  8. All extended parts located within ____ of the lightning protection system shall be bonded thereto.
    1800mm
  9. Transformer exceeding 112.5kVA, shall not be located within ____ from combustile materials of the building.
    300mm
  10. Electrodes of iron or steel plates shall be at least ___ in thickness.
    6.0mm
  11. What is the minimum insulation level (in volts) for the neutral conductors of a solidly grounded system?
    600V
  12. No boxes shall have an internal depth of less than how many millimeters?
    12mm
  13. What is the minimun insulation resistance required for circuits rated from 201 to 400A?
    25,000 ohms
  14. A heavy duty lamp holder shall have a rating no less than how many watts?
    600W
  15. In rigid metal conduit wiring, conduits shall be supported at least every _____.
    3000mm
  16. Conductors used in open wiring method within _____ from the floor shall be considered exposed to physical damage.
    2 000 mm
  17. What is the maximum electrical trade size of intermediate conduit?
    100mm
  18. Individual branch circuits using Type FCC (flat conductor cable) shall have ratings not exceeding how much amperes?
    30A
  19. Equipment for installation in hazardous locations must be tested and approved for use according to the classification of the hazards involved. These are divided into ____ groups.
    3
  20. Aerial cable under non-metallic extensions shall have a clearance of not less than how much from steel structure members or other conductive materials?
    50mm
  21. In an auxiliary gutter, how much is the minimum clearance required between bare current carrying metal parts and any metal surface of the gutter?
    26mm
  22. Heating elements of cables shall be separated at least by how much from the edge of outlet boxes and junction boxes?
    200mm
  23. Auxiliary gutters shall not contain more than ____ current carrying conductors at any cross section.
    30
  24. For the purpose of lightning protection, a high rise building is a building with a height over how much?
    23m

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