Hydraulics & Fluid Mechanics
According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to

more than the weight of the body
weight of the fluid displaced by the body
less than the weight of the body
the weight of the body

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Hydraulics & Fluid Mechanics
Metacentric height is given as the distance between

the center of gravity of the body and the center of buoyancy
the center of gravity of the body andthe meta center
center of buoyancy and metacentre
the center of gravity of the body and the center of pressure

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Hydraulics & Fluid Mechanics
For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is

inversely proportional to Reynolds number and directly proportional to pipe wall roughness
directly proportional to Reynolds number and independent of pipe wall roughness
inversely proportional to Reynolds number and indpendent of pipe wall roughness
directly proportional to pipe wall roughness and independent of Reynolds number

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Hydraulics & Fluid Mechanics
Non uniform flow occurs when

the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time
velocity, depth, pressure, etc. change from point to point in the fluid flow
the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
the direction and magnitude of the velocity at all points are identical

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