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

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

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

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

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Hydraulics & Fluid Mechanics
The horizontal component of force on a curved surface is equal to the

product of pressure intensity at its centroid and area
weight of liquid vertically above the curved surface
force on a vertical projection of the curved surface
force on the horizontal projection of the curved surface

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