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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
According to fan laws, for the fans having constant wheel diameters, the power demand varies

Directly as fan speed
Cube of fan speed
Square of fan speed
Square root of fan speed

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Hydraulics and Fluid Mechanics in ME
Power required to drive a centrifugal pump is directly proportional to _________ of its impeller.

Diameter
Square of diameter
Cube of diameter
Fourth power of diameter

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Hydraulics and Fluid Mechanics in ME
A balloon lifting in air follows the following principle

Archimedes principle
All of these
principle of buoyancy
law of gravitation

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Hydraulics and Fluid Mechanics in ME
A fluid in equilibrium can't sustain

Bending stress
Shear stress
Compressive stress
Tensile stress

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

More than 4000
Between 2000 and 4000
Less than 2000
Less than 4000

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Hydraulics and Fluid Mechanics in ME
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.

Equal to
Directly proportional
None of these
Inversely proportional

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