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Power Systems

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

 0.5
 0.75
 0.4
 0.25

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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?

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

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Power Systems
In a 400 KV network, 360 KV is recorded at a 400 KV bus. The reactive power absorbed by shunt rated for 50 MVAr, 400 KV connected at the bus is

 61.73 MVAr.
 45 MVAr.
  40.5 MVAr.
 55.56 MVAr.

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Power Systems
The time taken by the turbine to fall to 0 rpm speed from 3000 rpm is called

  damping time.
  coasting time.
  settling time.
  stopping time.

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Power Systems
If the load is short circuited, then reflection coefficient of voltage is

 -1
 0
 -2
 1

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Power Systems
A generated station has a maximum demand of 30 MW, a load factor of 60% and a plant capacity factor of 50%. The reserve capacity of the plant is

 6 MW
 12 MW
 10 MW
 5 MW

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