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Power Systems

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

 graphite
 beryllium
All of these
 liquid sodium

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Power Systems
Reflector of a nuclear reactor are made up of

 steel.
  beryllium.
  boron.
 cast iron.

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Power Systems
With reference to hydrometer station, the graphical representation of the discharge as function of time is known as

  Hydro-graph.
 Hectograph.
 Monograph.
 Load duration curve.

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Power Systems
In a 3-phase transmission line, each phase is supported by 3 insulated discs, maximum voltage of each disc is 20 kV. Find the operating voltage of the transmission line per phase if efficiency of string is 80.6%.

 52.84 kV
 83.76 kV
 48.36 kV
 20 kV

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Power Systems
A transmission line has 50 km operating at frequency of 500 Hz. Find the type of the line?

 medium transmission line
 long transmission line
 short transmission line
 any of the above

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Power Systems
Objectives of power system is/are

 nether 1 nor 2
 both 1 and 2
 Cost of electrical energy per KWh is to be minimum
 Rated voltage and frequency has to be supplied to the consumers

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