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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The viscosity of water at 20°C is

One centipoise
One poise
One centistoke
One stoke

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Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(2/3) Cd × b × √(2g) × H2
(2/3) Cd × b × √(2g) × H3/2
(2/3) Cd × b × √(2gH)
(2/3) Cd × b × √(2g) × H

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Hydraulics and Fluid Mechanics in ME
The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)

Q = (3Cd × a)/√(2h)
Q = (2/3). Cd × a × h
Q = Cd × a × 2gh
Q = (Cd × a)/√(2gh)

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Hydraulics and Fluid Mechanics in ME
The viscosity of a liquid __________ its rate of flow through a hole in a vessel.

None of these
Does not effect
Both A and B
Effects

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

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

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Hydraulics and Fluid Mechanics in ME
Bulk modulus of a fluid is the ratio of

Shear stress to shear strain
Increase in volume to the viscosity of fluid
Increase in pressure to the volumetric strain
Critical velocity to the viscosity of fluid

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