Power Systems
If power P available from a hydroelectric plant is given by the formula P = 9.81QH, where Q is the flow rate through the turbine in l / s and H is the head in meters, then P will be unit of

 kJ / S.
 HP.
 kWh.
  W.

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

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