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EEE :: Electrical Cables

Electrical Cables - section-1
  1. In a cable the voltage stress is maximum at

    2. A.

     Sheath
    B.

     Insulator
    C.

     Surface of the conductor
    D.

     Core of the conductor

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  2. The disadvantage with paper as insulating material is

    3. A.

     It is hygroscopic
    B.

     It has high capacitance
    C.

     It is an organic material
    D.

     None of the above

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  3. Which of the following protects a cable against mechanical injury?

    4. A.

     Bedding
    B.

     Sheath
    C.

     Armouring
    D.

     None of the above

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  4. In cables the charging current

    5. A.

     Lags the voltage by 90°
    B.

     Leads the voltage by 90°
    C.

     Lags the voltage by 180°
    D.

     Leads the voltage by 180°

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  5. The relative permittivity of rubber is

    6. A.

     Between 2 and 3
    B.

     Between 5 and 6
    C.

     Between 8 and 10
    D.

     Between 12 and 14

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  6. In the cables, the location of fault is usually found out by comparing

    7. A.

     The resistance of the conductor
    B.

     The inductance of conductors
    C.

     The capacitances of insulated conductors
    D.

     All above parameters

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  7. In single core cables armouring is not done to

    8. A.

     Avoid excessive sheath losses
    B.

     Make it flexible
    C.

     Either of the above
    D.

     None of the above

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