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EEE :: Transmission and Distribution

  1. Which of the following are the constants of the transmission lines?

  2. A.

     Resistance

    B.

     Inductance

    C.

     Capacitance

    D.

     All of the above

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  3. Which of the following materials is used for overhead transmission lines?

  4. A.

     Steel cored aluminium

    B.

     Galvanised steel

    C.

     Cadmium copper

    D.

     Any of the above

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  5. Which of the following relays is used on long transmission lines?

  6. A.

     Impedance relay

    B.

     Mho's relay

    C.

     Reactance relay

    D.

     None of the above

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  7. Which of the following methods is used for laying of underground cables?

  8. A.

     Direct laying

    B.

     Draw-in-system

    C.

     Solid system

    D.

     All of the above

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  9. The minimum clearance between the ground and a 220 kV line is about

  10. A.

     4.3 m

    B.

     5.5 m

    C.

     7.0 m

    D.

     10.5 m

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  11. A booster is a

  12. A.

     Series wound generator

    B.

     Shunt wound generator

    C.

     Synchronous generator

    D.

     None of the above

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  13. The effect of corona can be detected by

  14. A.

     Presence of ozone detected by odour

    B.

     Hissing sound

    C.

     Faint luminous glow of bluish color

    D.

     All of the above

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  15. In a D.C. 3-wire distributor using balancers and having unequal loads on the two sides

  16. A.

     both balancers run as generators

    B.

     both balancers run as motors

    C.

     balancer connected to lightly- loaded side runs as a motor

    D.

     balancer connected to heavily- loaded side runs as a motor

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  17. High voltage transmission lines use

  18. A.

     Suspension insulators

    B.

     Pin insulators

    C.

     Both (A) and (B)

    D.

     None of the above

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  19. Which of the following is the demerit of a 'constant voltage transmission system' ?

  20. A.

     Increase of short-circuit current of the system

    B.

     Availability of steady voltage at all loads at the line terminals

    C.

     Possibility of better protection for the line due to possible use of higher terminal reactants

    D.

     Improvement of power factor at times of moderate and heavy loads

    E.

     Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission

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