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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The value of bulk modulus of a fluid is required to determine

Mach number
Reynold's number
Euler's number
Froude's number

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Hydraulics and Fluid Mechanics in ME
A streamline is defined as the line

parallel to central axis flow
parallel to outer surface of pipe
along which the pressure drop is uniform
of equal yelocity in a flow

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Hydraulics and Fluid Mechanics in ME
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

4.0 m
2.5 m
2.4 m
3.0 m

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Hydraulics and Fluid Mechanics in ME
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

More than
None of these
Less than
Equal to

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Hydraulics and Fluid Mechanics in ME
Center of buoyancy is the

does not exist
e.g. of floating body
center of pressure of displaced volume
centroid of the displaced volume of fluid

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

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