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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
One poise is equal to

1 N-s/m2
10 N-s/m2
0.1 N-s/m2
100 N-s/m2

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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.

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

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Hydraulics and Fluid Mechanics in ME
Reynold's number is the ratio of the inertia force to the

Surface tension force
Gravity force
Elastic force
Viscous force

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

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Hydraulics and Fluid Mechanics in ME
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be

3 meters of water column
6 meters of water Column
5 meters of water column
2 meters of water column

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Hydraulics and Fluid Mechanics in ME
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is

1
2
43924
4

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