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Power Systems

Power Systems
For large plants of capacity for more than 15 MW, what type of cooling is used

  Hydrogen.
  Liquid.
  Air.
  Water.

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Power Systems
To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with

 3rd harmonic current.
  5th harmonic current.
 2nd harmonic current.
 7th harmonic current.

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Power Systems
One fission of U235 releases energy of

  200 MeV.
 435 MeV.
 335 MeV.
 525 MeV.

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Power Systems
The sequence components of the fault current are as follows: IR1 = j1.5 pu, IR2 = -j0.5 pu, IR0 = -j1. The type of fault is

 LLG
 LL
 LG
 LLL

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Power Systems
For n bus power system size of Y bus matrix is

 n×n
 (n-1)×(n-1)
 (n-2)×(n-2)
 (n-1)×(n-2)

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Power Systems
Ferranti effect can be compensated by which of the following

 shunt reactor
 both 1 and 2
 series capacitor
 shunt capacitor

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