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Power Systems

Power Systems
In kaplan runner, the number of blades is generally of the order of

 12 - 16.
  16 - 24.
 1 - 2.
  3 - 6.

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Power Systems
Maximum power transfer in a transmission line can be obtained by

 reducing reactance
None of these
 increasing voltage level
 either 1 or 2

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Power Systems
If the breakdown voltage of the insulator is high, the thickness of the insulator is

 it does not related to breakdown voltage
 high
None of these
 less

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

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Power Systems
What will be the ratio of the C.T. on the H.V side of a 3 - φ star / delta 33 / 11 kV transformer if the protecting CT on the LV side has a ratio of 300 : 5 ?

 120 : 6 / √3.
  200 : 5 / √3.
  100 : 5 / √3.
 150 : 4 / √3.

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Power Systems
A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?

 0.8 lag and 0.8 lead
 0.6 lag and 0.8 lead
 0.8 lag and 0.6 lead
 0.6 lag and 0.6 lead

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