Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

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

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Hydraulics & Fluid Mechanics
Fluid is a substance that

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

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Hydraulics & Fluid Mechanics
Choose the wrong statement

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

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