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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Free surface of a liquid tends to contract to the smallest possible area due to force of

surface tension
viscosity
friction
cohesion

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Hydraulics & Fluid Mechanics
Drag force is a function of i) projected area of the body ii) mass density of the fluid iii) velocity of the body The correct answer is

(i) and (ii)
(i), (ii) and (iii)
(i) and (iii)
(ii) and (iii)

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Hydraulics & Fluid Mechanics
At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

minimum
negative value
could be any value
maximum

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Hydraulics & Fluid Mechanics
The discharge through a V- notch varies as

H5’4 where H is head.
H3’2
H5/2
H1/2

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Hydraulics & Fluid Mechanics
If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its

specific density
specific weight
specific gravity
specific mass

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Hydraulics & Fluid Mechanics
A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of

4.8 M
4.2 M
4.6 M
4.0 M

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