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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies

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

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Hydraulics and Fluid Mechanics in ME
Medium specific speed of a pump implies it is

Any one of the above
Mixed flow pump
Axial flow pump
Centrifugal pump

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Hydraulics and Fluid Mechanics in ME
The viscosity of water at 20°C is

One centistoke
One poise
One centipoise
One stoke

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Hydraulics and Fluid Mechanics in ME
Differential monometer is used to measure

very low pressure
pressure in pipes, channels etc
difference of pressure between two points
atmospheric pressure

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Hydraulics and Fluid Mechanics in ME
In case of an airfoil, the separation of flow occurs

at the extreme rear of body
midway between rear and front of body
any where between rear and front of body depending upon Reynolds number
at the extreme front of body

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Hydraulics and Fluid Mechanics in ME
The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is (Assume that boundary layer is entirely laminar)

0.05 cm
0.20 cm
0.40 cm
0.10 cm

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