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Power Systems

Power Systems
Find the number of strands of ACSR conductor for 3 layer transmission line?

 29
 1
 7
 19

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Power Systems
Which of the following contributes to the Rankine cycle efficiency improvement in a thermal power plant

 Reheat of steam an intermediate stages.
 Use of steam for heating of boiler feed water.
 Use of high pressure.
All of these

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Power Systems
If a 500 MVA, 11 kV 3-phase generator at 50 Hz feeds through a transfer impedance of (0+j0.605) Ω/phase, an infinite voltage also at 11 kV, then the maximum steady state power transfer on the base of 500 MVA and 11 kV is

 0.4 pu
 0.8 pu
 1 pu
 0.5 pu

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Power Systems
The characteristic impedance of a transmission on line is

 Directly proportional to its length.
 Inversely proportional to its length.
  Independent of its length.
 Directly proportional to square root of its length.

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Power Systems
A 3-phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. The diameter of each conductor is 1.63 cm. The inductance of the line per phase per km is

 1.093 mH
 1.182 mH
 1.232 mH
 1.043 mH

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Power Systems
One fission of U235 releases energy of

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

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