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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?

 0.25
 0.5
 0.75
 1

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Power Systems
The zero sequence current of a generator for line to ground fault is j3 pu. Then the current through the neutral during the fault is

 j3 pu
 j1 pu
 j9 pu
 j6 pu

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Power Systems
Stock bridge dampers are used in case hill areas to over come the which problem?

All of these
 increase string efficiency
 unequal ice loading
 increase power factor

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Power Systems
Maximum efficiency of modern coal fired steam raising thermal power plants is restricted to about 035 (a low value), mainly because of

  high energy loss from turbine exhaust to condenser.
 high energy loss in boiler.
 low steam turbine mechanical efficiency.
 low alternative efficiency.

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Power Systems
On a power system network the load is increasing represents the value of impedance

  none of above.
  remains constant.
  decrease.
  increase.

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Power Systems
Out of the following plant categories which is not the base load power plant?

 Diesel.
 Run of river.
  Pump storage.
 Nuclear.

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