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EEE :: Transmission and Distribution

Transmission and Distribution - Section-1
  1. For an overhead line, the surge impedance is taken as

    2. A.

     20-30 ohms
    B.

     70-80 ohms
    C.

     100-200 ohms
    D.

     500-1000 ohms

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  2. Which of the following distribution systems is more reliable?

    3. A.

     Radial system
    B.

     Tree system
    C.

     Ring main system
    D.

     All are equally reliable

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  3. Most of the high voltage transmission lines in India are

    4. A.

     Underground
    B.

     Overhead
    C.

     Either of the above
    D.

     None of the above

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  4. There is a greater possibility of occurrence of corona during

    5. A.

     Dry weather
    B.

     Winter
    C.

     Summer heat
    D.

     Humid weather

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  5. By which of the following methods string efficiency can be improved?

    6. A.

     Using a guard ring
    B.

     Grading the insulator
    C.

     Using long cross arm
    D.

     Any of the above

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  6. The material commonly used for sheaths of underground cables is

    7. A.

     Lead
    B.

     Rubber
    C.

     Copper
    D.

     Iron

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  7. For which of the following equipment current rating is not necessary?

    8. A.

     Circuit breakers
    B.

     Isolators
    C.

     Load break switch
    D.

     Circuit breakers and load break switches

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  8. The voltage drop, for constant voltage transmission is compensated by installing

    9. A.

     Inductors
    B.

     Capacitors
    C.

     Synchronous motors
    D.

     All of above

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  9. The operating voltage of extra high tension cables is upto

    10. A.

     6.6 kV
    B.

     11 kV
    C.

     33 kV
    D.

     66 kV

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  10. When a conductor carries more current on the surface as compared to core, it is due to

    11. A.

     Permeability variation
    B.

     Corona
    C.

     Skin effect
    D.

     Unsymmetrical fault

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