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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece depends upon

Length of mouthpiece
Pressure of liquid
Velocity of liquid
Area of mouthpiece

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Hydraulics and Fluid Mechanics in ME
The hydraulic grade line is

always sloping downward in the direction of flow
All of these
always above the centre line of pipe
never above the energy grade line

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Hydraulics and Fluid Mechanics in ME
The pressure at a point in a fluid will not be same in all the directions when the fluid is

moving
inviscous and moving
viscous and moving.
viscous

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Hydraulics and Fluid Mechanics in ME
Discharge of a centrifugal pump is (where N = Speed of the pump impeller)

Directly proportional to N
Inversely proportional to N²
Directly proportional to N²
Inversely proportional to N

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Hydraulics and Fluid Mechanics in ME
According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

(2/3) × Cd (L - nH) × √(2gh)
(2/3) × Cd (L - nH) × √(2g) × H²
(2/3) × Cd (L - nH) × √(2g) × H5/2
(2/3) × Cd (L - 0.1nH) × √(2g) × H3/2

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Hydraulics and Fluid Mechanics in ME
Newton’s law of viscosity relates

viscosity and rate of angular deformation
shear stress and rate of angular deformation
intensity of pressure and rate of angular deformation
shear stress, viscosity and temperature

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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