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

The efficiency of reaction turbine is maximum when (where α = Angle m

1.	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» C. Vb = 0.5 V2 cos α