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Power Systems

Power Systems
A 3 layer and diameter of each strand is d, then find the total diameter of ACSR conductor?

 3d
 d
 5d
 2d

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Power Systems
For variable heads of near about but less than 30 m, which type of turbines is used hydro power plant

 None of above.
  Kaplan.
 Francis.
 Pelton.

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Power Systems
Pipes carrying steam are generally of

 aluminium.
  steel.
 cobalt.
 cast iron.

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Power Systems
A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging.

  14 %.
  56 %.
  28 %.
  None of above

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Power Systems
Two identical synchronous machines having same inertia constant are connected in parallel and swinging together. The effective inertia constant is 4 MJ/MVA. Then each machine has inertia constant of

 2 MJ/MVA
 4 MJ/MVA
 8 MJ/MVA
 16 MJ/MVA

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Power Systems
The per unit value of a 2 ohm resistor at 100 MVA and 10 kV base voltage is

 0.5 pu
 0.2 pu
 4 pu
 2 pu

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