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Power Systems

Power Systems
Cheapest plant in operation and maintenance is

  hydroelectric.
  steam power.
  nuclear.
  diesel power.

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

 800 Ω
 160 Ω
 200 Ω
 400 Ω

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Power Systems
When reactance grounding is used in network, the voltage between neutral and ground is

 3×IR0 × Xn
 IR0 × Xn
 both 1 and 3
 IN × Xn

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Power Systems
Which of the following relays are used in protection of medium transmission lines?

 Mho relays
 Impedance relays
 any of the above
 Admittance relays

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Power Systems
The flow duration curve at a given head of a hydroelectric plant is used to determine

 diversity factor for the plant.
  total power available at the site.
 total units of energy available.
 load factory at the plant.

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Power Systems
Mercury is choice with steam in binary vapor cycle because

 higher critical temperature and pressure.
 higher saturation temperature than other fluids.
  all of above.
 relative low vaporization pressure.

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