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Power Systems

Power Systems
The insulator thickness on the conductor, in cables depends upon

 reactive power
 current
 voltage
 power factor

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Power Systems
Which of the following material is not used as fuse element?

  Carbon.
  Copper.
  Silver.
  Aluminium.

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Power Systems
A transmission line has a reactance of 1 Pu is operating at Vs = Vr = 1 Pu. The generator is connected at source end which is delivering 0.5 Pu of active power. Find the load angle?

 35°
 45°
 60°
 30°

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Power Systems
Which type of connection is employed for current transformers for the protection of delta- star connected 3-phase transformer?

 star-star
 delta-delta
 delta-star
 star-delta

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Power Systems
The Y bus matrix of a 100 bus interconnected system is 90% sparse. Then find the number of non zero elements in the Y bus matrix?

 9000
 1000
 90
 10

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Power Systems
The time taken by the turbine to fall to 0 rpm speed from 3000 rpm is called

  stopping time.
  settling time.
  damping time.
  coasting time.

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