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Power Systems

Power Systems
Find the surge impedance of a line when inductance is 160 mH and capacitance is 1µF?

 400 Ω
 800 Ω
 200 Ω
 160 Ω

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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

 135.3 MWhr
 130.2 MWhr
 120 MWhr
 140 MWhr

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Power Systems
A thermal protection relay provides protection against what?

 Short circuit
 Over load
 any of the above
 Temperature

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Power Systems
Communications lines are treated as

 any of the above
 medium transmission lines
 long transmission lines
 short transmission lines

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Power Systems
Surge tank is kept very close to the

 pen stock
 generator
 spill way
 turbine

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Power Systems
Example of base load stations are

  both A and B.
  gas turbine.
  hydro.
  thermal.

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