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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Free surface of a liquid tends to contract to the smallest possible area due to force of

viscosity
cohesion
surface tension
friction

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Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

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

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Hydraulics & Fluid Mechanics
If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its

specific weight
specific density
specific gravity
specific mass

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Hydraulics & Fluid Mechanics
Separation of flow occurs when

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

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Hydraulics & Fluid Mechanics
According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to

less than the weight of the body
more than the weight of the body
weight of the fluid displaced by the body
the weight of the body

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Hydraulics & Fluid Mechanics
The density of water is 1000 kg/m3 at

20°C
0°C
0°K
4°C

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