Hydraulics and Fluid Mechanics in ME
The hydraulic efficiency of an impulse turbine is the

None of these
Ratio of the actual power produced by the turbine to the energy actually supplied by the turbine
Ratio of the work done on the wheel to the energy of the jet
Ratio of the actual work available at the turbine to the energy imparted to the wheel

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Hydraulics and Fluid Mechanics in ME
When a liquid is flowing through a pipe, the velocity of the liquid is

Zero at the centre and maximum near the walls
Minimum at the centre and maximum near the walls
Maximum at the centre and zero near the walls
Maximum at the centre and minimum near the walls

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Hydraulics and Fluid Mechanics in ME
Mach number is significant in

all of fhe above
supersonics, as with projectiles and jet propulsion
simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls
full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc

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