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Power Systems

Power Systems
The per unit value of a 2 ohm resistor at 100 MVA and 10 kV base voltage is

 2 pu
 0.5 pu
 0.2 pu
 4 pu

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Power Systems
When a pumped storage power plant is operated in conjunction with a steam power plant

 load factor of the steam plant is increased
 chances of the tripping of the system decrease
 the operating cost of the steam plant become optimum
All of these

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Power Systems
The surge impedance of a 400 km long overhead transmission line is 420 Ω. For a 200 km length of the same line, the surge impedance will be

 210 Ω
 400 Ω
 840 Ω
 420 Ω

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Power Systems
More efficient plants are used as

 both 1 and 2
 base load plant
 peak load plant
None of these

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Power Systems
If power P available from a hydroelectric plant is given by the formula P = 9.81QH, where Q is the flow rate through the turbine in l / s and H is the head in meters, then P will be unit of

 HP.
 kWh.
  W.
 kJ / S.

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Power Systems
Operating time of pumped storage plant is

 very high
 can't say
 high
 low

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