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Power Systems

Power Systems
Corona loss is ----------------- on hilly areas than as plain areas.

 more
 remain same
None of these
 less

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

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

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Power Systems
A power station has a maximum demand of 15000 kW. The annual load factor is 50% and plant capacity factor is 40%. What is the reserve capacity of the plant?

 3750 kW
 6000 kW
 3000 kW
 7500 kW

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Power Systems
Making and breaking currents of 3 phase AC circuit breakers in power system are respectively in what form?

 RMS and RMS value
 Instantaneous and RMS value
 any of the above
 RMS and Instantaneous value

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Power Systems
When is the ferranti effect on long overhead lines experienced?

 The line is fully loaded
 The line is heavily loaded
 The line is lightly loaded
 The power factor is unity

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Power Systems
A hydro electric generating station is supplied from a reservoir of capacity 5 × 10 − 6 cubic meters at a head of 200 meters. Find the total energy available in KWh if the overall efficiency is 75 %

 3 × 106 kWh.
 4.06 × 106 kWh.
 5 × 106 kWh.
  2.044 × 106 kWh.

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