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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 cos α
B .  Vb = V cos α
C .  Vb = 0.5 V2 cos α
D .  Vb = V2 cos α
Answer: Option B
Answer: (b).Vb = V cos α

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