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Power Systems

Power Systems
A hydroelectric power station is commonly found in

  hilly areas.
 desert areas.
 swamps.
 grasslands.

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Power Systems
Advantage/s of per unit system as compare to absolute system?

All of these
 calculation time is less
 memory required is less
 only one equation is required

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Power Systems
Breaking current is a ------------------ value?

 maximum
 any of the above
 average
 RMS

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

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

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Power Systems
The conductor carries more current on surface as compared to core. This is called as

 unsymmetrical fault
 corona effect
All of these
 skin 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?

 Over current relay
 Differential relay
 Over fluxing relay
 Buchholz relay

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