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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The shear stress between the two liquid layers is __________ proportional to the distance between two layers.

Directly
Inversely
None of these
Both A and B

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Hydraulics and Fluid Mechanics in ME
An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)

tanθ = a/g
tanθ = a2/2g
tanθ = a/2g
tanθ = 2 a/g

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Hydraulics and Fluid Mechanics in ME
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be

6 meters of water Column
5 meters of water column
2 meters of water column
3 meters of water column

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Hydraulics and Fluid Mechanics in ME
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

Q = π.D.bf.V
Q = D.b.Vf
Q = π.D.Vf
Q = π.b.Vf

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Hydraulics and Fluid Mechanics in ME
The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy’s coefficient of friction for pipe, and l = Length of pipe)

d = (D⁵/8fl)1/4
d = (D⁵/8fl)1/3
d = (D⁵/8fl)1/2
d = (D⁵/8fl)1/5

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Hydraulics and Fluid Mechanics in ME
The undershot water wheels are those in which

The wheel runs partly by the weight of water and partly by the impulse of water
The wheel runs entirely by the weight of water
The wheel runs entirely by the impulse of water
None of these

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