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Power Systems

Power Systems
The angular moment of 10 MVA generator is 0.2. Find the new value of angular moment for 20 MVA base?

 0.2 pu
 0.1 pu
 0.25 pu
 0.4 pu

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

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

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Power Systems
The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation

 Z1 = Z2 = Z0
 (Z1 = Z2) > Z0
 any of the above
 (Z1 = Z2) < Z0

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Power Systems
Objectives of power system is/are

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

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Power Systems
A steam power generation has an overall efficiency of 20 %. 0.6 Kg of coal is burnt per kWh of electrical energy generated. Calculated the calorific value of fuel

 7000 KCal / Kg.
  7166.67 KCal / Kg.
 7268.45 KCal / Kg.
 7562 KCal / Kg.

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Power Systems
Equal area criteria is used for

 absolute stability of the system
 either 1 or 2
 relative stability of the system
 nether 1 nor 2

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