Hydraulics and Fluid Mechanics in ME
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be

6 meters of water Column
5 meters of water column
3 meters of water column
2 meters of water column

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Hydraulics and Fluid Mechanics in ME
Cavitation will begin when

flow is increased
pressure becomes more than critical pressure
pressure is increased
the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid

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Hydraulics and Fluid Mechanics in ME
Froude number is significant in

Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
Supersonics, as with projectile and jet propulsion
All of the listed here
Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls

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