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Power Systems

Power Systems
Normally Z bus matrix is a

 full matrix
 null matrix
 sparse matrix
 unit matrix

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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
For a lossy transmission line, the characteristic impedance does not depend on

 The load terminating the line.
 The operating frequency of the line.
 The conductivity of conductors.
 The permittivity of the dielectric separating the conductor.

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Power Systems
Surge impedance loading of a line is increased by which of the following compensation methods?

 both 1 and 2
 series capacitor
 shunt capacitor
 shunt reactor

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Power Systems
MCB stands for

  minimum capacity breaker.
  molded circuit breaker.
  miniature circuit breaker.
  maximum capacity breaker.

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Power Systems
Which one of following fuels is used by slow thermal nuclear reaction for power generation

 U238.
 Pu239.
  U235.
 Th232.

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