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Power Systems

Power Systems
Surge impedance loading (SIL) is represented by

 Vl²*√(C/L)
 both 1 and 2
 Vl²/Zs
 Vph²/Zs

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Power Systems
What will be the ratio of the C.T. on the H.V side of a 3 - φ star / delta 33 / 11 kV transformer if the protecting CT on the LV side has a ratio of 300 : 5 ?

  200 : 5 / √3.
 120 : 6 / √3.
  100 : 5 / √3.
 150 : 4 / √3.

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Power Systems
In a regenerative cycle, feed water is heated by

 heaters.
 all of above.
  drained steam from turbine.
 exhaust gas.

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Power Systems
Thermal shielding is provided to

 absorb the fast neutron.
All of these
 prevent the reactor wall from getting heated.
 protected the operating personal from exposure to radiations.

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

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

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Power Systems
Condition for maximum voltage regulation

 tanφ = X/R
 cosφ = X/R
 tanφ = R/X
 cosφ = R/X

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