The efficiency of reaction turbine is maximum when (where α = Angle made by the

Question

The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity ‘V’ at inlet)

Options:

A . Vb = 0.5 V cosα

B . Vb = V cos α

C . Vb = 0.5 V² cosα

D . Vb = V² cos α

Answer: Option B

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