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

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Power Systems
Which of the following is/are the advantages of synchronous phase modifier over the shunt compensation?

 both 1 and 2
 smooth voltage regulation is possible by controlling excitation
 initial cost is low
 single unit can be used as both capacitance and inductor by adjusting the excitation

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Power Systems
The incremental fuel costs for two generating units G1 and G2 are given by Ic1 = 25 + 0.2 PG1 and Ic2 = 32 + 0.2 PG2, where PG1 and PG2 are real powers generated by the units. The economic allocation for a total load of 250 MW, neglecting transmission loss, is given by

 PG1 = 109.75 MW and PG2 = 140.25 MW
 PG1 = 142.5 MW and PG2 = 107.5 MW
 PG1 = 125 MW and PG2 = 125 MW
 PG1 = 100 MW and PG2 = 150 MW

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