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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following instrument can be used for measuring speed of a submarine moving in deep sea

hot wire anemometer
Venturimeter
pitot tube
rotameter

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

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Hydraulics and Fluid Mechanics in ME
Choose the correct relationship

kinematicviscosity = dynamicviscosity x density
dynamicviscosity = kinematicviscosity x density
specific gravity = gravity x density
gravity = specific gravity x density

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Hydraulics and Fluid Mechanics in ME
Centre of pressure compared to e.g. is

below it
above it
above or below depending on area of body
at same point

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Hydraulics and Fluid Mechanics in ME
According to fan laws, at constant speed and capacity, the pressure and power vary

Directly as the air or gas density
Inversely as density
As square of density
Inversely as square root of density

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Hydraulics and Fluid Mechanics in ME
The unit of dynamic viscosity in S.I. units is

Poise
N-s/m²
Stoke
N-m/s²

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