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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Roynolds number is

less than 4000
between 2000 and 4000
more than 4000
less than 2000

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Hydraulics and Fluid Mechanics in ME
All the terms of energy in Bernoulli’s equation have dimension of

energy
mass
work
length

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Hydraulics and Fluid Mechanics in ME
The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is

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

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Hydraulics and Fluid Mechanics in ME
For starting an axial flow pump, its delivery valve should be

Open
Closed
Depends on starting condition and flow desired
Could be either open or closed

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Hydraulics and Fluid Mechanics in ME
Practical fluids

possess all the above properties
possess surface tension
are viscous
are compressible

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Hydraulics and Fluid Mechanics in ME
A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.

None of these
More than
Less than
Equal to

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