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Power Systems

Power Systems
A 3-phase breaker is rated at 2000 MVA, 33 kV, its making current will be

  89.22 kVA.
  35 kVA.
 49 kVA.
 70 kVA.

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Power Systems
A hydro power plant of run off river type should be provided with pondage so that the

 pressure inside the turbine casing remains.
 operating head is controlled.
 kinetic energy of the running water is fully utilized.
  firm capacity of plant is increased.

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Power Systems
Which of the following will take least time in starting from cold condition to full load operation

 Nuclear power plant.
 Gas turbine plant.
  Hydro electric power plant.
 Thermal power plant.

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Power Systems
The charging current of a 400 kV line is more than that of a 220 kV line of the same length?

None of these
 True
 False
 either 1 or 2

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Power Systems
Which of the following statements is/are true? By increasing of temperature,

 neither 1 nor 2
 sag increase
 both 1 and 2
 tension decrease

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Power Systems
The unit protection scheme provides

 back up protection.
 simultaneous protection.
 remote protection.
  primary protection.

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