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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called

Reaction
Metacentre
Up-thrust
Buoyancy

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Hydraulics and Fluid Mechanics in ME
Metacentre is the point of intersection of

All of these
mid point between e.g. and center of buoyancy
buoyant force and the center line of body
vertical upward force through e.g. of body and center line of body

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Hydraulics and Fluid Mechanics in ME
The depth of the centre 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

3.0 m
5.0 m
4.0 m
2.4 m

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Hydraulics and Fluid Mechanics in ME
A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is

400 kg/cm²
40 × 10⁵ kg/cm²
40 × 10⁶ kg/cm²
4000 kg/cm²

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Hydraulics and Fluid Mechanics in ME
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

Cc/Cr
Cv × Cr
Cc × Cv
Cc × Cr

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Hydraulics and Fluid Mechanics in ME
An error of 1% in measuring head over the apex of the notch (H) will produce an error of _________ in discharge over a triangular notch.

0.025
0.02
0.015
0.01

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