Given that a = nozzle angle, n = number of rows of moving blades in a velocity compounded. Impulse turbine, the optimum blade speed ratio is:

\[\frac{n\cos {{\alpha }_{1}}}{2}\]

\[\frac{\cos {{\alpha }_{1}}}{2(n+1)}\]

\[\frac{\cos {{\alpha }_{1}}}{2n}\]

Given that a = nozzle angle, n = number of rows of moving blades in a

1.	Given that a = nozzle angle, n = number of rows of moving blades in a velocity compounded. Impulse turbine, the optimum blade speed ratio is:
A.	\[2\cos {{\alpha }_{1}}n\]
B.	\[\frac{n\cos {{\alpha }_{1}}}{2}\]
C.	\[\frac{\cos {{\alpha }_{1}}}{2(n+1)}\]
D.	\[\frac{\cos {{\alpha }_{1}}}{2n}\]
Answer» E.

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Given that a = nozzle angle, n = number of rows of moving blades in a velocity compounded. Impulse turbine, the optimum blade speed ratio is:

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