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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The eddy viscosity for turbulent flow is

a physical property of the fluid.
dependent on the flow
a function of temperature only
independent of the flow

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Hydraulics and Fluid Mechanics in ME
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)

wH2/2
wH/2
wH2/3
wH

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Hydraulics and Fluid Mechanics in ME
The time oscillation of a floating body with increase in meatcentric height will be

Lower/higher depending on weight of body
Lower
Same
Higher

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Hydraulics and Fluid Mechanics in ME
The units of dynamic or absolute viscosity are

newton-sec per meter
newton-sec² per meter
kg sec/meter
metres² per sec

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Hydraulics and Fluid Mechanics in ME
The highest efficiency is obtained with a channel of __________ section.

Rectangular
Trapezoidal
Square
Circular

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Hydraulics and Fluid Mechanics in ME
In an immersed body, centre of pressure is

Below be centre of gravity
Above the centre of gravity
Could be above or below e.g. depending on density of body and liquid
At the centre of gravity

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