Hydraulics and Fluid Mechanics in ME
The flow rate in gear pump

Decreases with increase in pressure
Unpredictable
Increases with increase in pressure
More or less remains constant with increase in pressure

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Hydraulics and Fluid Mechanics in ME
The hydraulic efficiency of a reaction turbine, is the ratio of

None of these
Actual work available at the turbine to energy imparted to the wheel
Power produced by the turbine to the energy actually supplied by the turbine
Work-done on the wheel to the energy (or head of water) actually supplied to the turbine

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Hydraulics and Fluid Mechanics in ME
Reynolds number is significant in

simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls
All of these
full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc
supersonics, as with projectile and jet propulsion

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