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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)

w × Q × hf
w × Q (H + hf)
w × Q (H - hf)
w × Q × H

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Hydraulics and Fluid Mechanics in ME
A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be

100m
1 m
None of these
10m

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Hydraulics and Fluid Mechanics in ME
Fluid is a substance which offers no resistance to change of

Flow
Shape
Volume
Pressure

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Hydraulics and Fluid Mechanics in ME
The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)

wH/2
wH2/2
wH2/4
wH

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Hydraulics and Fluid Mechanics in ME
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

Less than
More than
None of these
Equal to

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Hydraulics and Fluid Mechanics in ME
The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

Mechanical
Hydraulic
Overall
None of these

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