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Power Systems

Power Systems
Buchholz relay is used for protection of

  bus bar.
  none of these.
  transformer.
  alternator.

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Power Systems
Advantages of per unit system is/are

 It has units for all quantities
All of these
 Need of transformation ratio
 No units for any quantity

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Power Systems
Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

  Increase but does not doubled.
 Decrease but does not halves.
 Halves.
 Doubled.

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Power Systems
Reflector of a nuclear reactor are made up of

  boron.
  beryllium.
 cast iron.
 steel.

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Power Systems
Pelton turbine is a ----------- turbine

 axial flow
 inward radial flow
 impulsive
 any of the above

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Power Systems
Under over excitation synchronous phase modifier works as

 shunt reactor
 series capacitor
 shunt capacitor
 any of the above

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