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Power Systems

Power Systems
In a 4*4 Y bus matrix the number of non zero elements are 12. Find the sparsity of the system?

 1
 0.75
 0.5
 0.25

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Power Systems
The specific speed ( NS ) of turbine is given by

 P√( N ) / H3/2.
 N√( P ) / H2/3.
  N√( P ) / H1.25.
 none of these.

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Power Systems
Water hamming process in pen-stocks results in

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

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Power Systems
For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence,

None of these
 this must be a short line
 this may either be a medium line or short line
 this expression is true for any line

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Power Systems
Surge impedance loading can be increased by

 increasing of inductance value
 increasing of voltage level
 increasing of capacitance value
 both 1 and 2

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Power Systems
Which one of following is employed as a moderator by CANDU type of slow thermal nuclear reactors

  Heavy water.
 Graphite.
 Beryllium.
 Water.

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