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

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

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Power Systems
Which of the following statements is true? Corona loss increases with

 decrease in conductor size and decrease in supply frequency
 decrease in conductor size and increase in supply frequency
 increase in conductor size and increase in supply frequency
 increase in conductor size and decrease in supply frequency

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