HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called

Steady flow

Streamline flow

Uniform flow

Turbulent flow

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A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is

None of these

33.3 kN

35.3 kN

3.53 kN

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The kinematic viscosity is the

Product of absolute viscosity and mass of the liquid

Product of absolute viscosity and density of the liquid

Ratio of density of the liquid to the absolute viscosity

Ratio of absolute viscosity to the density of the liquid

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Metacentric height is the distance between the metacentre and

center of gravity

water surface

center of pressure

center of buoyancy

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In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be

Double

Four times

Eight times

Sixteen times

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Centre of pressure compared to e.g. is

below it

at same point

above it

above or below depending on area of body

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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) × H5/2

(2/3) × Cd (L - nH) × √(2g) × H²

(2/3) × Cd (L - 0.1nH) × √(2g) × H3/2

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The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called

Up-thrust

Metacentre

Reaction

Buoyancy

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A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

b²/12 + x̅

(d²/12 x̅) + x̅

d²/12 + x̅

(bd²/12) + x̅

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The property of fluid by virtue of which it offers resistance to shear is called

surface tension

adhesion

cohesion

viscosity

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