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Power Systems

Power Systems
Length of short transmission line is up to

 150 km
 any of the above
 80 km
 40 km

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Power Systems
In nuclear power plants which material is/are used as coolant?

All of these
 beryllium
 liquid sodium
 graphite

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Power Systems
A 200 MVA alternator operated at no load at frequency of 50 Hz, it has inertia constant of 5 MWsec/MVA and governing system has a time delay of 0.6 sec. If the load of 50 MW is suddenly applied then find the frequency deviation during this time?

 -0.85 Hz
 0.76 Hz
 -0.76 Hz
 0.85 Hz

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Power Systems
Equal area criterion gives the information regarding

 swing curves
 absolute stability
 relative stability
 stability region

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Power Systems
Which of the following will take least time in starting from cold condition to full load operation

 Thermal power plant.
  Hydro electric power plant.
 Gas turbine plant.
 Nuclear power plant.

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

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

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