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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For pipes, turbulent flow occurs when Reynolds number is

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

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Hydraulics and Fluid Mechanics in ME
Bulk modulus of a fluid is the ratio of

Increase in volume to the viscosity of fluid
Increase in pressure to the volumetric strain
Critical velocity to the viscosity of fluid
Shear stress to shear strain

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Hydraulics and Fluid Mechanics in ME
The discharge through a channel of rectangular section will be maximum, if

Its depth is thrice the breadth
Its breadth is twice the depth
Its breadth is thrice the depth
Its depth is twice the breadth

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Hydraulics and Fluid Mechanics in ME
According to Bernoulli's equation

Z - p/w - v²/2g = constant
Z + p/w - v²/2g = constant
Z - p/w + v²/2g = constant
Z + p/w + v²/2g = constant

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

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Hydraulics and Fluid Mechanics in ME
Hot wire anemometer is used to measure

Pressure in liquids
Liquid discharge
Pressure in gases
Gas velocities

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