Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

the height of barometer will be less
it is the best liquid
both (B) and (C)
its vapour pressure is so low that it may be neglected

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Hydraulics & Fluid Mechanics
Choose the wrong statement

when in equilibrium, fluids cannot sustain tangential forces
fluids are capable of flowing
fluids conform to the shape of the con-taining vessels
when in equilibrium, fluids can sustain shear forces

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Hydraulics & Fluid Mechanics
Non uniform flow occurs when

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

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

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

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