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Power Systems

Power Systems
In thermal plant most of the energy is wasted in

 turbines
 boiler
 ESP
 condenser

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

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

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Power Systems
Mho relay is usually employed for protection of

 short transmission lines only
 long transmission lines only
 medium transmission lines only
 any line

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Power Systems
Objectives of power system is/are

 both 1 and 2
 Rated voltage and frequency has to be supplied to the consumers
 Cost of electrical energy per KWh is to be minimum
 nether 1 nor 2

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Power Systems
The sequence components of the fault current are as follows : Ipositive = j1.5 pu, Inegative = − j0.5 pu, Izero = − j pu Which fault is this?

  LLLG.
  LL.
  LLG.
  LG.

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Power Systems
A thermal power plant is being supplied with coal having much more ash content than that for which it was designed. Which of its following units needs major modifications

 Ash handling unit.
 Pulversing unit.
 Cooling tower.
 Condenser.

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