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Power Systems

Power Systems
Mho relay is used for protection of

  long lines.
  short lines.
  medium lines.
  none of these.

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Power Systems
A cable has inductance of 0.22 mH per km and capacitance of 0.202 µF per km. The surge impedance of the cable is

 28 Ω
 52 Ω
 40 Ω
 33 Ω

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Power Systems
One Kg of natural uranium gives energy equivalent to about

 5000 Kg of coal.
 1000 Kg of coal.
 100 Kg of coal.
  10500 Kg of coal.

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Power Systems
Characteristics of arc quenching medium is/are

 High thermal conductivity
All of these
 High dielectric strength
 Non flammable

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Power Systems
Three generators rated 100 MVA, 11 kV have an impedance of 0.15 pu each. If in the same plant, these generators are being replaced by a single equivalent generator, the effective impedance of equivalent generator will be

 0.05 pu
 0.25 pu
 0.15 pu
 0.45 pu

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Power Systems
Deflectors are provided in

 Francis turbine.
 propeller turbine.
 Kaplan turbine.
  Pelton wheel.

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