Menu
Home / EEE / Electrical Cables :: section-1

EEE :: Electrical Cables

Electrical Cables - section-1
  1. If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be

    2. A.

     5 kV/mm
    B.

     10 kV/mm
    C.

     15 kV/mm
    D.

     30 kV/mm

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. If the length of a cable is doubled, its capacitance

    3. A.

     Becomes one-fourth
    B.

     Becomes one-half
    C.

     Becomes double
    D.

     Remains unchanged

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. Cables for 220 kV lines are invariably

    4. A.

     Mica insulated
    B.

     Paper insulated
    C.

     Compressed oil or compressed gas insulated
    D.

     Rubber insulated

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. The metallic sheath may be made of lead or lead alloy or of aluminum.

    5. A.

     Yes
    B.

     No

    View Answer

    Workspace

    Discuss Discuss in Forum

  5. The insulating material should have

    6. A.

     Low permittivity
    B.

     High resistivity
    C.

     High dielectric strength
    D.

     All of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to

    7. A.

     Absence of harmonics
    B.

     Nonexistence of any stability limit
    C.

     Smaller dielectric loss
    D.

     Absence of ripples

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. Which of the following insulation is used in cables?

    8. A.

     Varnished cambric
    B.

     Rubber
    C.

     Paper
    D.

     Any of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  8. It is difficult to maintain oil filled cables.

    9. A.

     Yes
    B.

     No

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?

    10. A.

     Polyvinyle chloride
    B.

     Vulcanised rubber
    C.

     Impregnated paper
    D.

     Compressed SFe gas
    E.

     none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. The electrostatic stress in underground cables is

    11. A.

     Same at the conductor and the sheath
    B.

     Minimum at the conductor and maximum at the sheath
    C.

     Maximum at the conductor and minimum at the sheath
    D.

     Zero at the conductor as well as on the sheath

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers