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mechanical engineering steam nozzles and turbines
1. The impulse turbine rotor efficiency will have a maximum value of 0.5 cos2 α, where α is the nozzle exit flow angle, if the
(A): blade solidity is 0.65
(B): blade velocity coefficient is unity
(C): blades are equiangular
(D): blades are equiangular and frictionless
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