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Power Systems

Power Systems
Reflector nuclear reactor are made of

 cast iron.
  beryllium.
 steel.
 boron.

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Power Systems
Maximum power capacity of a transmission line can be increased by

 decreasing reactance value
 either 1 or 2
 increasing voltage level
 nether 1 nor 2

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Power Systems
A transmission line has a surge impedance of 400 Ω for a length of the line of 200 km. If the length of line is increased to 400 km, then its surge impedance is

 400 Ω
 0 Ω
 800 Ω
 200 Ω

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Power Systems
Ferranti effect occurs under

 full load
 half load
 any of the above
 no load

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Power Systems
One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is

 140 MWhr
 135.3 MWhr
 130.2 MWhr
 120 MWhr

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Power Systems
The zero sequence current of a generator for line to ground fault is j3 pu. Then the current through the neutral during the fault is

 j3 pu
 j1 pu
 j9 pu
 j6 pu

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