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Power Systems

Power Systems
Proximity effect is more in case of

 power cables
 same in both cases
 over head lines
None of these

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Power Systems
The specific speed ( NS ) of turbine is given by

 N√( P ) / H2/3.
  N√( P ) / H1.25.
 P√( N ) / H3/2.
 none of these.

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Power Systems
In load flow studies PV bus is treated as PQ bus when

 voltage at the bus become high
 phase angle become high
 any of the above
 reactive power goes beyond limit

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Power Systems
A network containing 50 buses in which 10 are the voltage control buses, 6 are the generator buses. Find the size of the Jacobian matrix?

 84*84
 34*34
 33*33
 83*83

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Power Systems
The per unit impedance of a circuit element is 0.30. If the base kV and base MVA are halved, then the new value of the per unit impedance of the circuit element will be

 0.0060
 0.0030
 0.60
 0.30

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Power Systems
The essential requirement(s) for power plants to be operated as peak load plants are

 Quick response to load variation.
 Capability of quick starts.
 Low capital cost.
All of these

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