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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
When a body floating in a liquid, is displaced slightly, it oscillates about

center of buoyancy
center of pressure
e.g. of body
metacentre

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Hydraulics & Fluid Mechanics
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)

frictionless flow
uniform flow
steady flow
incompressible flow

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Hydraulics & Fluid Mechanics
For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be

337.5
675
600
300

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Hydraulics & Fluid Mechanics
THE THEORETICAL VALUE OF COEFFICIENT OF CONTRACTION OF A SHARP EDGED ORIFICE IS

1.01
0.95
0.611
0.86

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Hydraulics & Fluid Mechanics
The flow which neglects changes in a transverse direction is known as

steady flow
turbulent flow
uniform flow
one dimensional flow

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Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

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

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