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Power Systems

Power Systems
In Francis turbine runner, the number blades is usually of the order of

  16 - 24.
 12 - 14.
 3 - 6.
 6 - 8.

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Power Systems
The time taken by the turbine to fall to 0 rpm speed from 3000 rpm is called

  settling time.
  stopping time.
  coasting time.
  damping time.

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Power Systems
For load flow studies, What are the quantities specified at load bus are

 V and δ
 P and V
 P and Q
 δ and Q

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Power Systems
In a thermal power plants, pressure in the working fluid cycle is developed by

 superheater.
 turbine.
  feed water pump.
 condenser.

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Power Systems
A coal fired steam power station working at a plant factor of 80% has one 500 MW generating unit. If the heat content of coal is 2 kWh/kg, the overall plant efficiency is 40% and a train load of coal is 2000 metric tons, then the number of trains required daily for the plant is

 10
 16
 6
 2

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Power Systems
Steady state stability of a power system is improved by

 single pole switching
All of these
 decreasing generator inertia
 using double circuit line instead of single circuit line

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