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Power Systems

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

  Liquid.
  Air.
  Hydrogen.
  Water.

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Power Systems
The main objectives of electrical power transmission is/are

 Transmission system must be more efficient with minimum line losses
 Voltage regulation of the transmission line must be zero or minimum
 both 1 and 2
 nether 1 nor 2

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Power Systems
An alternator having an induced emf of 1.6 pu is connected to an infinite bus of 1 pu. If the bus bar has reactance of 0.6 pu and alternator has reactance of 0.2 pu, what is the maximum power that can be transferred?

 6 pu
 2 pu
 5 pu
 2.67 pu

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Power Systems
For complete protection of 3-phase system from the short circuit faults minimum number of relays required are

 six
 one
 three
 two

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Power Systems
Which of the following power stations is mainly used to cover peak load on the system?

 coal based thermal power plant
 pumped storage hydro power plant
 nuclear plant
 gas based thermal power plant

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Power Systems
The 1st nuclear plant in world was commissioned in

  U.S.S.R.
  UAE.
  U.S.A.
 U.K.

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