Power Systems
If, for a given alternator in economic operation mode, the incremental cost is given by (0.012 P + 8) Rs/MWh, dPL/dP = 0.2 and plant λ = 25, then power generation is

 1250 MW
 1000 MW
 1500 MW
 750 MW

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Power Systems
A thermal power station needs space

  less than that required by hydro-power station of same capacity.
 less than that required by the diesel power station of same output.
 less than that required by atomic power station of the same output.
 less than that required by a gas turbine power plant of same output.

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Power Systems
Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero

 if the shunt admittances at the buses are ignored
 if both 2 and 3 are satisfied
 if the mutual couplings between transmission lines are absent
 always

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