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Power Systems

Power Systems
Normally Z bus matrix is a

 null matrix
 sparse matrix
 full matrix
 unit matrix

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Power Systems
Efficiency of thermal power plant can be taken as

  efficiency of thermal cycle.
  turbine efficiency.
  product of efficiencies of all stages.
  generator efficiency.

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Power Systems
Equal area criterion gives the information regarding

 stability region
 absolute stability
 relative stability
 swing curves

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Power Systems
The power output of a nuclear power station is proportional to

  the rate at which fission reaction occurs.
 square of the rate at which fission reaction occurs.
 square root of the rate at which fission reaction occurs.
 none of above.

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Power Systems
For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes is

 Pelton.
 Francis.
  Kaplan.
 Impeller.

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Power Systems
In a 3-phase, 5 kV, 5 MVA system, what is the base impedance?

 5 ohms
 500 ohms
 50 ohms
 0.5 ohm

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