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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For manometer, a better liquid combination is one having

higher surface tension
lower surface tension
surface tension is no criterion
high density and viscosity

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Hydraulics and Fluid Mechanics in ME
The two important forces for a floating body are

inertial, gravity
buoyancy, inertial
buoyancy, gravity
buoyancy, pressure

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Hydraulics and Fluid Mechanics in ME
The tendency of a liquid surface to contract is due to the following property

viscosity
cohesion
adhesion
surface tension

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Hydraulics and Fluid Mechanics in ME
The unit of dynamic viscosity in S.I. units is

N-s/m²
Poise
Stoke
N-m/s²

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Hydraulics and Fluid Mechanics in ME
The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.

More than
Equal to
Less than
None of these

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Hydraulics and Fluid Mechanics in ME
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

Q = π.b.Vf
Q = D.b.Vf
Q = π.D.Vf
Q = π.D.bf.V

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