Power Systems
In a steam power plant, the feed water coming to the economizer is heated plant the feed water coming to the economizer is heated using

  flue gas.
 LP steam.
 HP steam.
 direct heat in the furnace.

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Power Systems
The modern trend in electric power generation

  none of above.
 to have large number of small size thermal plants located at different places.
 to have large size thermal plants near load centre.
 to have large size thermal plant located near coal fields.

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Power Systems
An hydro-graph indicates

 the maximum and minimum run off during the period.
 the discharge at any time during the period under consideration.
All of these
 the average run off during the period.

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