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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Pressure of the order of 10''' torr can be measured by

ionisastion gauge
Pirani Gauge
Bourdon tube
Micro-manometer

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Hydraulics & Fluid Mechanics
The line of action of the buoyant force acts through the

center of gravity of any submerged body
center of the volume of floating body
centriod of the displaced volume of fluid
centroid of the volume of fluid vertically above the body

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Hydraulics & Fluid Mechanics
Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the

force of friction
force of cohesion
force of diffusion
force of adhesion

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Hydraulics & Fluid Mechanics
The peoperty by virtue of which a liquid opposes relative motion between its different layers is called

osmosis
surface tension
co-efficient of viscosity
viscosity

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Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

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

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Hydraulics & Fluid Mechanics
Separation of flow occurs when

the cross-section of a channel is reduced
All of these
the boundary layer comes to rest
the pressure intensity reaches a minimum

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