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Power Systems

Power Systems
In a 4 bus,4×4 Y bus matrix the number of non zero elements are 12. Find the number of transmission lines?

 5
 8
 2
 4

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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

 135.3 MWhr
 130.2 MWhr
 120 MWhr
 140 MWhr

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Power Systems
Which one of following fuels is used by slow thermal nuclear reaction for power generation

 U238.
  U235.
 Th232.
 Pu239.

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Power Systems
Which type of connection is employed for current transformers for the protection of delta- star connected 3-phase transformer?

 star-star
 delta-delta
 delta-star
 star-delta

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Power Systems
Which of the following grounding is not practically preferred for protection of equipments?

 resistance grounding
 reactance grounding
All of these
 isolated grounding

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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

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

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