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Power Systems

Power Systems
Which of following materials can be used as coolant

 CO2.
 Heavy water.
 Helium.
  Any of above.

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

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

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Power Systems
Units of incremental cost is

 Rs/hr
 RsMW/hr
 MWhr/Rs
 Rs/MWhr

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Power Systems
Specified quantities of slack bus are

 P and Q
 P and δ
 V and δ
 P and V

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Power Systems
If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is

 5 MJ
 50 MJ
 500 MJ
 10 MJ

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Power Systems
Operating time of pumped storage plant is

 low
 can't say
 high
 very high

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