HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

Puck up the wrong statement about centrifugal pump

Discharge a diameter

Power a speed⁴

Head a diameter

Head a speed²

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Ratio of inertia force to surface Jension is known as

Mach number

Weber’s number

Reynold’s number

Froude number

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A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

more

less

equal

less at low temperature and more at high temperature

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The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

μ π³ N² R² /3600 t

μ π³ N² R⁴ /3600 t

μ π³ N² R⁴ /1800 t

μ π³ N² R² /1800 t

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Liquids transmit pressure equally in all the directions. This is according to

Boyle's law

Newton's formula

Pascal's law

Archimedes principle

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The centre of pressure acts __________ the centre of gravity of immersed surface.

Above

At

None of these

Below

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The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.

Equal to

None of these

Less than

More than

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When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as

Steady flow

Turbulent flow

Vortex flow

Uniform flow

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Froude number is significant in

Supersonics, as with projectile and jet propulsion

All of the listed here

Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls

Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

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The discharge in an open channel corresponding to critical depth is

Zero

None of these

Maximum

Minimum

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