Power Systems
Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line?

 50 Hz
 0.48 Hz
 -0.52 Hz
 0.52 Hz

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Power Systems
In Rankine cycle, the work output from a turbine is given by

  change of enthalpy between inlet and outlet.
  change in temperature between inlet and outlet.
  change in internal energy between inlet and outlet.
  change of entropy between inlet and outlet.

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Power Systems
Half life is defined as

 the time required to spiliting of a heavy nucleus.
  the time required for one half of isotope to decay.
 none of above.
 the time required for full of atoms in a specimen disintegrate.

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