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Power Systems

Power Systems
Find the value of a729, where "a" is the operator

 α
 0
 α²
 1

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Power Systems
Plug setting of a relay can be altered by varying

 no. of ampere-turns.
 adjustable back up stop.
 air gap of magnetic path.
 none of these.

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

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

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Power Systems
The rating of CB is in terms of

  current.
  voltage.
  VAR.
  volt - ampere.

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Power Systems
The Y bus matrix of a 100 bus interconnected system is 90% sparse. Then find the number of non zero elements in the Y bus matrix?

 10
 1000
 9000
 90

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Power Systems
In kaplan runner, the number of blades is generally of the order of

 12 - 16.
  16 - 24.
 1 - 2.
  3 - 6.

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