The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of b

Question - The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

Options:

A . (1 + cos φ)/2

B . (1 - cos φ)/2

C . (1 + sin φ)/2

D . (1 - sin φ)/2

Answer: Option A
Answer: (a).(1 + cos φ)/2

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