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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.

IG / Ax̅ below
IG / Ax̅ above
Ax̅ / IG below
Ax̅ / IG above

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Hydraulics and Fluid Mechanics in ME
According to equation of continuity,

a1v1 = a2v2
w1v1 = w2v2
w1a1 = w2a2
a1/v1 = a2/v2

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Hydraulics and Fluid Mechanics in ME
Units of surface tension are

it has no units
distance
both of the above
energy/unit area

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Hydraulics and Fluid Mechanics in ME
According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

(2/3) × Cd (L - nH) × √(2gh)
(2/3) × Cd (L - nH) × √(2g) × H5/2
(2/3) × Cd (L - nH) × √(2g) × H²
(2/3) × Cd (L - 0.1nH) × √(2g) × H3/2

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Hydraulics and Fluid Mechanics in ME
The buoyancy depends upon the

Compressibility of the liquid
Pressure with which the liquid is displaced
Viscosity of the liquid
Weight of the liquid displaced

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Hydraulics and Fluid Mechanics in ME
A notch is used to measure __________ of liquids.

Velocity
Volume
Pressure
Discharge

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