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Power Systems

Power Systems
For flat voltage profile system, voltage regulation is

 any of the above
 100%
 50%
 0%

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

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

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Power Systems
Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line?

 -0.52 Hz
 0.52 Hz
 0.48 Hz
 50 Hz

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Power Systems
A 4 bus power system consists of 4 transmission lines, then find the sparsity of Y bus matrix?

 0.5
 0.25
 0.4
 0.75

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

 any of the above
 RMS
 peak value
 average

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Power Systems
Telecommunication lines are transposed to reduce the

 efficiency
All of these
 voltage level
 radio interference in communication lines

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