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Power Systems

Power Systems
Peak load power plants is/are

 both 1 and 2
 nuclear plants
 pumped storage plant
 diesel plant

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

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

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Power Systems
Advantages of per unit system is/are

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

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Power Systems
Transmission lines are transposed to reduce

 interference with neighbouring communication lines
 proximity effect
 skin effect
 ferranti effect

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Power Systems
Which one of the following relays has the capability of anticipating the possible major fault in a transformer?

 Differential relay
 Buchholz relay
 Over current relay
 Over fluxing relay

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Power Systems
Which one of following is employed as a moderator by CANDU type of slow thermal nuclear reactors

 Graphite.
 Water.
  Heavy water.
 Beryllium.

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