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Power Systems

Power Systems
The corona loss on a particular system at 60 Hz is 1 kW/km per phase. What is the corona loss at 50 Hz in kW/km per phase?

 1.13
 1
 0.93
 0.882

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

 0.75
 0.25
 0.4
 0.5

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Power Systems
A 3 - Φ, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is

 3600 A.
 1200 A.
  35 kA.
 104.8 kA.

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Power Systems
When series reactor is used in generating stations, the fault current magnitude is

 remains unaffected
 reduced
 increased
 any of the above

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Power Systems
The value of inductance used for compensation of arcing grounds is

 1/3ω²C
 ω²C/3
 3ω²C
 3/ω²C

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Power Systems
High capacity generators and motors are of

 star connected with grounding network
 star connected network
 any of the above
 delta connected network

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