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Power Systems

Power Systems
In Francis turbine runner, the number blades is usually of the order of

 6 - 8.
 12 - 14.
 3 - 6.
  16 - 24.

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Power Systems
Steady state stability of a power system is improved by

 decreasing generator inertia
 using double circuit line instead of single circuit line
 single pole switching
All of these

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Power Systems
For loss less line, find the ratio of length to the wave length of a signal for a phase shift of 0.05 radians?

 8 × 10³
 7.95 × 10³
 7.95 × 10-3
 2 × 10-3

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Power Systems
Incremental cost of two generators Ic1 = 0.2 P1+60, Ic2 = 0.3 P2+40 and the ratings of the generator are 150 and 250 MW. Find the load sharing of each generator for a load of 200 MW?

 P1 = 60 MW, P2 = 140 MW
 P1 = 80 MW, P2 = 120 MW
 P1 = 100 MW, P2 = 100 MW
 P1 = 120 MW, P2 = 80 MW

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Power Systems
Which of following is a medium and low head turbines

  Kaplan and Francis turbines.
  Francis and Kaplan turbines.
  None of above.
  Pelton and Kaplan turbines.

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Power Systems
An alternator having an induced emf of 1.6 pu is connected to an infinite bus of 1 pu. If the bus bar has reactance of 0.6 pu and alternator has reactance of 0.2 pu, what is the maximum power that can be transferred?

 6 pu
 2.67 pu
 5 pu
 2 pu

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