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EEE :: Electrical Cables

Electrical Cables - section-1
  1. The bedding on a cable consists of

    2. A.

     Hessian cloth
    B.

     Jute
    C.

     Any of the above
    D.

     None of the above

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  2. The insulating material for a cable should have

    3. A.

     Low cost
    B.

     High dielectric strength
    C.

     High mechanical strength
    D.

     All of the above

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  3. Underground cables are laid at sufficient depth

    4. A.

     To minimize temperature stresses
    B.

     To avoid being unearthed easily due to removal of soil
    C.

     To minimize the effect of shocks and vibrations due to gassing vehicles, etc.
    D.

     For all of the above reasons

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  4. In capacitance grading a homogeneous dielectric is used.

    5. A.

     Yes
    B.

     No

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  5. Dielectric strength of rubber is around

    6. A.

     5 kV/mm
    B.

     15 kV/mm
    C.

     30 kV/mm
    D.

     200 kV/mm

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  6. The material for armouring on cable is usually

    7. A.

     Steel tape
    B.

     Galvanized steel wire
    C.

     Any of the above
    D.

     None of the above

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  7. In the cables, sheaths are used to

    8. A.

     Prevent the moisture from entering the cable
    B.

     Provide enough strength
    C.

     Provide proper insulation
    D.

     None of the above

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  8. In a cable immediately above metallic sheath ________ is provided.

    9. A.

     Earthing connection
    B.

     Bedding
    C.

     Armouring
    D.

     None of the above

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  9. In capacitance grading of cables we use a _________ dielectric.

    10. A.

     Composite
    B.

     Porous
    C.

     Homogeneous
    D.

     Hygroscopic

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  10. The insulating material for cables should

    11. A.

     Be acid proof
    B.

     Be non-inflammable
    C.

     Be non-hygroscopic
    D.

     Have all above properties

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