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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.

Full
Free
Partially
None of these

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Hydraulics and Fluid Mechanics in ME
The centre of gravity of the volume of the liquid displaced is called

None of the listed here
Metacentre
Centre of pressure
Centre of buoyancy

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Hydraulics and Fluid Mechanics in ME
The velocity corresponding to Reynold number of 2800, is called

Sub-sonic velocity
Lower critical velocity
Higher critical velocity
Super-sonic velocity

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Hydraulics and Fluid Mechanics in ME
A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

14π R7/2/15Cd × a √(2g)
14π R5/2/15Cd × a √(2g)
14π R1/2/15Cd × a √(2g)
14π R3/2/15Cd × a √(2g)

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Hydraulics and Fluid Mechanics in ME
The undershot water wheels are those in which

The wheel runs entirely by the impulse of water
None of these
The wheel runs entirely by the weight of water
The wheel runs partly by the weight of water and partly by the impulse of water

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of

A triangle
None of these
A paraboloid
An ellipse

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