Hydraulics and Fluid Mechanics in ME
Braking jet in an impulse turbine is used

To bring the runner to rest in a short time
To break the jet of water
To change the direction of runner
None of these

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Hydraulics and Fluid Mechanics in ME
The flow ratio of Francis turbine is defined as the ratio of the

Velocity of runner at inlet to the velocity of flow at inlet
Velocity of flow at inlet to the theoretical jet velocity
Theoretical velocity of jet to the velocity of flow at inlet
None of these

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