Hydraulics & Fluid Mechanics
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

decrease
increase
increase/decrease depending on depth of immersion
remain same

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

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

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Hydraulics & Fluid Mechanics
Fluid is a substance that

cannot remain at rest under action of any shear force
cannot be subjected to shear forces
always expands until it fills any container
has the same shear stress.at a point regardless of its motion

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Hydraulics & Fluid Mechanics
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is

parabolic distribution across the section
constant over the cross section
zero at the mid plane and varies linearly with distance from mid plane
zero at plates and increases linearly to midpoint

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