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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Dynamic viscosity of most of the gases with rise in temperature

decreases
unpredictable
remains unaffected
increases

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Hydraulics and Fluid Mechanics in ME
The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (ω) rad/s about its vertical axis, is

π w ω² r⁴/4g
π w ω² r²/4g
π w ω² r³/4g
π w ω² r²/2g

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Hydraulics and Fluid Mechanics in ME
In order to measure the flow with a Venturimeter, it is installed in

Inclined line with flow upwards
Any direction and in any location
Inclined line with flow downwards
Horizontal line

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Hydraulics and Fluid Mechanics in ME
Center of buoyancy is the

centroid of the displaced volume of fluid
e.g. of floating body
center of pressure of displaced volume
does not exist

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Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

viscosity
surface tension forces
air resistance
atmospheric pressure

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Hydraulics and Fluid Mechanics in ME
The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

0.75v²/2g
v²/2g
0.375v²/2g
0.5v²/2g

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