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EEE :: Electrical Cables

  1. Rubber is most commonly used insulation in cables.

  2. A.

     Yes

    B.

     No


  3. The advantage of oil filled cables is

  4. A.

     More perfect impregnation

    B.

     Smaller overall size

    C.

     No ionization, oxidation and formation of voids

    D.

     All of the above


  5. The thickness of metallic shielding on cables is usually

  6. A.

     0.04 mm

    B.

     0.2 to 0.4 mm

    C.

     3 to 5 mm

    D.

     40 to 60 mm


  7. Copper as conductor for cables is used as

  8. A.

     Annealed

    B.

     Hardened and tempered

    C.

     Hard drawn

    D.

     Alloy with chromium


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

  10. A.

     Blue

    B.

     Black

    C.

     Brown

    D.

     None of the above


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

  12. A.

     Yes

    B.

     No


  13. PVC stands for

  14. A.

     Polyvinyl chloride

    B.

     Post varnish conductor

    C.

     Pressed and varnished cloth

    D.

     Positive voltage conductor


  15. The advantage of cables over overhead transmission lines is

  16. A.

     Easy maintenance

    B.

     Low cost

    C.

     Can be used in congested areas

    D.

     Can be used in high voltage circuits


  17. Cables, generally used beyond 66 kV are

  18. A.

     Oil filled

    B.

     S.L. type

    C.

     Belted

    D.

     Armoured


  19. The surge resistance of cable is

  20. A.

     5 ohms

    B.

     20 ohms

    C.

     50 ohms

    D.

     100 ohms