Civil Engineering MCQs

Page No. 12

The vapour pressure over the concave surface is________________?


aless man the vapour pressure over the plane surface

✓


bequal to the vapour pressure over the plane surface

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cgreater than the vapour pressure over the plane surface

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dzero

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Surface energy per unit area of a surface is numerically equal to ___________________?


aatmospheric pressure

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b surface tension

✓


cforce of adhesion

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dviscosity

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View Answer surface tension

Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the______________?


a force of adhesion

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b force of cohesion

✓


cforce of friction

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dforce of diffusion

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The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately_______________?


a 1 mm

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b 5 mm

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c10 mm

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d 30 mm

✓


View Answer 30 mm

The process of diffusion of one liquid into the other through a semi-permeable membrane is called _______________?


aviscosity

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bosmosis

✓


ccohesion

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ddiffusivity

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View Answer osmosis

The continuity equation is connected with_______________?


aviscous/unviscous fluids

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bcompressibility of fluids

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c conservation of mass

✓


d steady/unsteady flow

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


a Boyle’s law

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bArchimedes principle

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c Pascal’s law

✓


dNewton’s formula

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View Answer Pascal’s law

Capillary action is due to the__________________?


asurface tension

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bcohesion of the liquid

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cadhesion of the liquid molecules and the molecules on the surface of a solid

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dall of the above

✓


View Answer all of the above

The rise or depression of liquid in a tube due to surface tension wim increase in size of tube will_______________?


aincrease

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b remain unaffected

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c may increase or decrease depending on the characteristics of liquid

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ddecrease

✓


View Answer decrease

The units of dynamic or absolute viscosity are_______________?


ametres2 per sec

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bkg sec/meter

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c newton-sec per meter

✓


dnewton-sec2 per meter

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