M

Mr. Dubey • 52.30K Points
Coach 

Q. have the highest vane angle at inlet (β1 value)?

(A) slow runner
(B) medium runner
(C) fast runner
(D) vane angle is defined only for kaplan turbines and not francis turbines
Correct : Option (C)

Explanation: 
 considering the velocity diagram of francis turbine at the inlet for a fast runner, vane angle is an obtuse angle. whereas, it is right angle for medium runner and an acute angle for a slow runner.

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