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Power Systems

Power Systems
Reflector nuclear reactor are made of

 boron.
  beryllium.
 steel.
 cast iron.

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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
 0.85 Hz
 -0.76 Hz

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Power Systems
In load flow studies PV bus is treated as PQ bus when

 reactive power goes beyond limit
 any of the above
 voltage at the bus become high
 phase angle become high

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Power Systems
Maximum power capacity of a transmission line can be increased by

 decreasing reactance value
 either 1 or 2
 nether 1 nor 2
 increasing voltage level

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Power Systems
Demand factor of a plant is

 1
 greater than 1
 less than 1
 0

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Power Systems
The capacitance of an overhead transmission line increases with

 increase in height of conductors above ground
 increase in mutual geometrical mean distance
 neither 1 nor 2
 both 1 and 2

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