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Power Systems

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

 6 - 8.
 3 - 6.
  16 - 24.
 12 - 14.

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Power Systems
Which of following materials can be used as coolant

 Heavy water.
 CO2.
  Any of above.
 Helium.

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Power Systems
Two generating stations delivering a powers of P1 = 150 MW, P2 =100 MW and the B coefficients are B11 = 0.005, B22 = 0.002, B12=B21= -0.001. Find the transmission line losses?

 85.5
 105.2
 95.5
 102.5

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Power Systems
Efficiency of thermal power plant can be taken as

  generator efficiency.
  turbine efficiency.
  efficiency of thermal cycle.
  product of efficiencies of all stages.

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Power Systems
Find the value of a729, where "a" is the operator

 α²
 α
 0
 1

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Power Systems
A 3 core cable gives on test a capacitance of 3.7 µF between two cores. Find the line charging current of the cable when it is connected to 11 kV, 50 Hz system?

  14.76 A.
 1 A.
 14.7 mA.
 1.476 A.

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