Power Systems
The load current in short circuit calculations are neglected because

 both 1 and 2
 short circuit currents are much larger than load currents
 nether 1 nor 2
 short circuit currents are greatly out of phase with load currents

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Power Systems
In coal fired thermal power stations, what are the electrostatic precipitators used for?

 To collect the dust particles from the flue gases
 To remove dust particles setting on the bus bar conductors in the station switch yard
All of these
 To keep the air heaters clean

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