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EEE :: Electrical Cables

Electrical Cables - section-1
  1. Rubber is most commonly used insulation in cables.

    2. A.

     Yes
    B.

     No

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  2. The advantage of oil filled cables is

    3. A.

     More perfect impregnation
    B.

     Smaller overall size
    C.

     No ionization, oxidation and formation of voids
    D.

     All of the above

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  3. The thickness of metallic shielding on cables is usually

    4. A.

     0.04 mm
    B.

     0.2 to 0.4 mm
    C.

     3 to 5 mm
    D.

     40 to 60 mm

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  4. Copper as conductor for cables is used as

    5. A.

     Annealed
    B.

     Hardened and tempered
    C.

     Hard drawn
    D.

     Alloy with chromium

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  5. In case of three core flexible cable the color of the neutral is

    6. A.

     Blue
    B.

     Black
    C.

     Brown
    D.

     None of the above

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  6. Natural rubber is obtained from milky sap of tropical trees.

    7. A.

     Yes
    B.

     No

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  7. PVC stands for

    8. A.

     Polyvinyl chloride
    B.

     Post varnish conductor
    C.

     Pressed and varnished cloth
    D.

     Positive voltage conductor

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  8. The advantage of cables over overhead transmission lines is

    9. A.

     Easy maintenance
    B.

     Low cost
    C.

     Can be used in congested areas
    D.

     Can be used in high voltage circuits

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  9. Cables, generally used beyond 66 kV are

    10. A.

     Oil filled
    B.

     S.L. type
    C.

     Belted
    D.

     Armoured

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  10. The surge resistance of cable is

    11. A.

     5 ohms
    B.

     20 ohms
    C.

     50 ohms
    D.

     100 ohms

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