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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Which of the following is demensionless

specific gravity
specific speed
specific volume
specific weight

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Hydraulics & Fluid Mechanics
The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is (where R is the radius of pipe)

1/3 R
1/2 R
2/3 R
3/4 R

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Hydraulics & Fluid Mechanics
For measuring flow by a venturimeter, if should be installed in

inclined line with upward flow
vertical line
in any direction and in any location.
horizontal line

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

surface tension
friction
viscosity
cohesion

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Hydraulics & Fluid Mechanics
Flow at constant rate through a tapering pipe is i) steady flow ii) uniform flow iii) unsteady flow iv) non-uniform flow The correct answer is

(i) and (ii)
(ii) and (iii)
(i)and(iv)
(ii) and (iv)

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Hydraulics & Fluid Mechanics
For a floating body to be in equilibrium

All of these
a righting couple should be formed
meta center should be above e.g.
center of buoyancy and e.g. must lie on same vertical plane

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