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Power Systems

Power Systems
Surge tank is kept very close to the

 pen stock
 spill way
 generator
 turbine

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Power Systems
Stock bridge dampers are used to

All of these
 increase the sag
 reduce the vibrations at the point of support
 reduce the tension

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

  16 - 24.
 1 - 2.
 12 - 16.
  3 - 6.

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Power Systems
Most commonly used material for insulator is

All of these
 mica
 porcelain
 glass

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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?

 90
 10
 9000
 1000

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Power Systems
The time taken by the turbine to fall to 0 rpm speed from 3000 rpm is called

  damping time.
  settling time.
  coasting time.
  stopping time.

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