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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Hydrometer is used to determine

specific gravity of liquids
relative humidity
specific gravity of solids
specific gravity of gases

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Hydraulics and Fluid Mechanics in ME
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

constant
dependent only on Reynolds number
a function of Reynolds number and relative roughness
dependent on relative roughness only

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Hydraulics and Fluid Mechanics in ME
The vapour pressure over the concave surface is

less man the vapour pressure over the plane surface
equal to the vapour pressure over the plane surface
zero
greater than the vapour pressure over the plane surface

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Hydraulics and Fluid Mechanics in ME
The maximum discharge over a broad crested weir is

1.71 Cd × L × H3/2
0.384 Cd × L × H3/2
0.384 Cd × L × H1/2
1.71 Cd × L × H1/2

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Hydraulics and Fluid Mechanics in ME
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

Same quantity of liquid
0.75 Q
Q/0.75
1.5 Q

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Hydraulics and Fluid Mechanics in ME
Practical fluids

are compressible
possess all the above properties
possess surface tension
are viscous

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