Question

The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity (V) at inlet)
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 1

option B is the correct answer

Answer 2

B.Vb=V cos a is the right answer.........