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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe)

0.223 R
0.707 R
0.577 R
0.423 R

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Hydraulics and Fluid Mechanics in ME
Which of the following statement is correct as regard to water wheels?

They are suitable even for low water heads
They have slow speeds
They give constant efficiency, even if the discharge is not constant
All of these

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Hydraulics and Fluid Mechanics in ME
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

less at low temperature and more at high temperature
equal
less
more

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Hydraulics and Fluid Mechanics in ME
The vapour pressure over the concave surface is

equal to the vapour pressure over the plane surface
less man the vapour pressure over the plane surface
zero
greater than the vapour pressure over the plane surface

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Hydraulics and Fluid Mechanics in ME
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as

one dimensional flow
turbulent flow
steady flow
uniform flow

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Hydraulics and Fluid Mechanics in ME
The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

Medium speed pump with radial flow at outlet
Slow speed pump with radial flow at outlet
High speed pump with axial flow at outlet
High speed pump with radial flow at outlet

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