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Power Systems

Power Systems
Transmission line parameters of the short transmission line are

 Z,0,Y,1
 1,Z,0,1
 1,0,Y,1
 1,Z,Y,1

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Power Systems
For a 500 Hz frequency excitation, a 100 km long power line will be modelled as

 shunt capacitor
 long transmission line
 any of the above
 medium transmission line

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Power Systems
In hydro power stations what is an enlarged body of water just above the intake and used as a regulating reservoir called

  Fore bay.
 Spillways.
 Penstock.
 Reservoir.

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Power Systems
When reactance grounding is used in network, the voltage between neutral and ground is

 IN × Xn
 both 1 and 3
 IR0 × Xn
 3×IR0 × Xn

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Power Systems
A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 secs. The symmetrical breaking current is

  35 kA.
 50 kA.
 45 kA.
 55 kA.

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Power Systems
The insulation of the modern EHV lines is designed based on

 R × I.
 corona.
 the lighting voltage.
  the switch voltage.

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