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Power Systems

Power Systems
In Francis turbine runner, the number blades is usually of the order of

 12 - 14.
 3 - 6.
 6 - 8.
  16 - 24.

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Power Systems
Graphite is use din nuclear plant as a / an

 electrode.
 fuel.
 coolant.
  moderator.

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Power Systems
The specific speed of water turbine is the speed at which the turbine develops

 maximum horse power.
 unit horse power at all heads.
  unit horse power at unit head.
 a minimum horse power.

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Power Systems
The function of a surge tank is to

 produce surge in the pipeline.
 none of above.
  relieve water hammer pressure in the penstock.
 supply water at constant pressure.

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Power Systems
The function of draft tube is reaction turbine is to

 reduce water hammer.
 increase flow rate of water.
 all of above.
  convert kinetic energy of water.

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Power Systems
The insulation of the modern EHV lines is designed based on

 corona.
 the lighting voltage.
  the switch voltage.
 R × I.

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