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Power Systems

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

 12 - 14.
 6 - 8.
 3 - 6.
  16 - 24.

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Power Systems
What are the tests performed for oil-filled and gas-filled cables ?

 Impulse tests.
 Thermal stability test.
 Load cycle tests.
  All of these.

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Power Systems
Transmission line parameters of the short transmission line are

 1,Z,Y,1
 1,Z,0,1
 Z,0,Y,1
 1,0,Y,1

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Power Systems
A 3-phase, 110 kV coaxial XLPE insulated power cable delivering power at 50 Hz, has a capacitance of 125 nF/km. If the dielectric loss tangent of XLPE is 2*10^-4, then dielcetric power loss in this cable in W/km/phase is

 38.6
 31.7
 35.45
 23.9

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Power Systems
One fission of U235 releases energy of

  200 MeV.
 435 MeV.
 525 MeV.
 335 MeV.

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Power Systems
Water hamming process in pen-stocks results in

  noise increases, pressure increases, velocity decreases.
  noise increases.
None of these
  pressure increases.

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