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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be

w/h
h/w
h
wh

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Hydraulics and Fluid Mechanics in ME
In a venturi-flume, the flow takes place at

Absolute pressure
Atmospheric pressure
Gauge pressure
None of these

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Hydraulics and Fluid Mechanics in ME
For a body floating in a liquid the normal pressure exerted by the liquid acts at

bottom surface of the body
e.g. of the body
all points on the surface of the body
metacentre

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Hydraulics and Fluid Mechanics in ME
When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

0.707 a. √2gH
0.5 a. √2gH
√2gH
0.855 a. √2gH

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Hydraulics and Fluid Mechanics in ME
The cavitation in reaction turbines is avoided, to a great extent by

Providing highly polished blades to the runner
All of these
Using stainless steel runner of the turbine
Installing the turbine below the tail race level

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Hydraulics and Fluid Mechanics in ME
Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of

High initial and maintenance cost
Necessity of air vessel
Lower speed of operation
Lower discharge

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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