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Power Systems

Power Systems
If skin depth is more, then skin effect is

None of these
 less
 either 1 or 2
 more

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Power Systems
Alternate formation and breakage of bubbles are called

All of these
  cavitations.
  water hamming.
  surgfication.

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Power Systems
A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?

 0.6 lag and 0.8 lead
 0.6 lag and 0.6 lead
 0.8 lag and 0.6 lead
 0.8 lag and 0.8 lead

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

 0.25
 0.5
 0.75
 1

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Power Systems
A guard ring is used in string type insulator having 3 units to improve string efficiency. Find the capacitance of metal link 2 if pin to earth capacitance of each unit is 1 F?

 1 F
 2 F
 0.5 F
 4 F

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Power Systems
One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is

 130.2 MWhr
 135.3 MWhr
 120 MWhr
 140 MWhr

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