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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.

Equal to
One-half
One-third
One-fourth

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as

Steady flow
Turbulent flow
Vortex flow
Uniform flow

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Hydraulics and Fluid Mechanics in ME
The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to

0.0001
0.1
0.01
0.001

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Hydraulics and Fluid Mechanics in ME
The cavitation in reaction turbines is avoided, to a great extent by

Providing highly polished blades to the runner
Using stainless steel runner of the turbine
All of these
Installing the turbine below the tail race level

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Hydraulics and Fluid Mechanics in ME
Hydrometer is used to determine

relative humidity
specific gravity of solids
specific gravity of gases
specific gravity of liquids

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Hydraulics and Fluid Mechanics in ME
The losses are more in

laminar flow
turbulent flow
transition flow
critical flow

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