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Power Systems

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

 12 - 14.
  16 - 24.
 3 - 6.
 6 - 8.

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Power Systems
A power station supplies the peak load of 50 MW, 40 MW and 70 MW to three localities. The annual load factor is 0.50 p.u. and the diversity factor of the load at the station is 1.55 the maximum demand on the station and average load respectively will be

 57.5 MW.
 53 MW.
 52 MW.
  51.61 MW.

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Power Systems
If a generator of 250 MVA rating has an inertia constant of 6 MJ/MVA, its inertia constant on 100 MVA base is

 6 MJ/MVA
 2.5 MJ/MVA
 10.5 MJ/MVA
 15 MJ/MVA

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Power Systems
Which of the following effects are associated with transmission line

All of these
 skin effect
 corona effect
 ferranti effect

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

 10 MJ
 500 MJ
 50 MJ
 5 MJ

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Power Systems
The steam power plant efficiency can be improved by

 using large quantity of water.
 decreasing the load on the plant.
  using high temperature and high pressure steam.
 burning large amount of coal.

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