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Power Systems

Power Systems
Generation of of one watt needs about ______________ fission per second

 3.1 × 106.
  3.1 × 1010.
 3.1 × 107.
 3.1.

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Power Systems
The insulator thickness on the conductor, in cables depends upon

 power factor
 voltage
 reactive power
 current

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Power Systems
What type of back up protection is used for alternators?

  IDMT relay.
  Mho relay.
  Buchholz relay.
  Impedance relay.

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Power Systems
A synchronous generator is of 100 MVA have inertia constant of 20 MJ/MVA. Find the angular momentum in MJsec/electrical degrees

 5
 2000
 0.22
 0.4

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Power Systems
The rate of rise of re-striking voltage is dependent upon

 inductance of the system only
 capacitance of the system only
 both 1 and 2
 resistance of the system only

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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
 6
 16
 2

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