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EEE :: Transmission and Distribution

Transmission and Distribution - Section-1
  1. For aluminium, as compared to copper, all the following factors have higher values except

    2. A.

     Specific volume
    B.

     Electrical conductivity
    C.

     Coefficient of linear expansion
    D.

     Resistance per unit length for same cross-section

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  2. 310 km line is considered as

    3. A.

     A long line
    B.

     A medium line
    C.

     A short line
    D.

     Any of the above

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  3. In a tap changing transformer, the tappings are provided on

    4. A.

     Primary winding
    B.

     Secondary winding
    C.

     High voltage winding
    D.

     Any of the above

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  4. Galvanized steel wire is generally used as

    5. A.

     Stay wire
    B.

     Earth wire
    C.

     Structural components
    D.

     All of the above

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  5. In the analysis of which of the following lines shunt capacitance is neglected?

    6. A.

     Short transmission lines
    B.

     Medium transmission lines
    C.

     Long transmission lines
    D.

     Medium as well as long transmission lines

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  6. The usual spans with R.C.C. poles are

    7. A.

     40-50 meters
    B.

     60-100 meters
    C.

     80-100 meters
    D.

     300-500 meters

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  7. The power factor of industrial loads is generally

    8. A.

     Unity
    B.

     Lagging
    C.

     Leading
    D.

     Zero

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  8. The voltage regulation in magnetic amplifier type voltage regulator is effected by

    9. A.

     Electromagnetic induction
    B.

     Varying the resistance
    C.

     Varying the reactance
    D.

     Variable transformer

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  9. Constant voltage transmission entails the following disadvantage

    10. A.

     Large conductor area is required for same power transmission
    B.

     Short-circuit current of the system is increased
    C.

     Either of the above
    D.

     None of the above

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  10. When a live conductor of public electric supply breaks down and touches the earth which of the following will happen?

    11. A.

     Current will flow to earth
    B.

     Supply voltage will drop
    C.

     Supply voltage will increase
    D.

     No current will flow in the conductor

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