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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

(L.A.N)/60
2 L.A.N
L.A.N
(2 L.A.N)/60

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

Atmospheric pressure
Gauge pressure
Absolute pressure
None of these

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Hydraulics and Fluid Mechanics in ME
Head developed by a centrifugal pump depends on

Speed
Impeller diameter
Both (A) and (B) above
Fluid density

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

More than
None of these
Less than
Equal to

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Hydraulics and Fluid Mechanics in ME
A body floats in stable equilibrium

When its meatcentric height is zero
Metacentre has nothing to do with position of e.g. for determining stability
When its e.g. is below its center of buoyancy
When the metacentre is above e.g.

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Hydraulics and Fluid Mechanics in ME
For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

Centrifugal
Reciprocating
Mixed flow
Axial flow

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