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Power Systems

Power Systems
Operating time of pumped storage plant is

 low
 high
 very high
 can't say

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Power Systems
The generating station suitable to operate as peak load plant is

 Power station.
 Thermal power station.
  Pumped storage.
 Nuclear power station.

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

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

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Power Systems
A transmission line has a reactance of 1 Pu is operating at Vs = Vr = 1 Pu. The generator is connected at source end which is delivering 0.5 Pu of active power. Find the load angle?

 45°
 60°
 35°
 30°

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Power Systems
The presence of earth in case of overhead lines

 increase inductance
 increase capacitance
 decrease inducatance
 decrease capacitance

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Power Systems
Advantages of per unit system is/are

 It has units for all quantities
All of these
 No units for any quantity
 Need of transformation ratio

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