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


cgreater than the vapour pressure over the plane surface


dzero



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


aatmospheric pressure


b surface tension


cforce of adhesion


dviscosity


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


b force of cohesion


cforce of friction


dforce of diffusion



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


a 1 mm


b 5 mm


c10 mm


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


bosmosis


ccohesion


ddiffusivity


View Answer osmosis

The continuity equation is connected with_______________?


aviscous/unviscous fluids


bcompressibility of fluids


c conservation of mass


d steady/unsteady flow



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


a Boyle’s law


bArchimedes principle


c Pascal’s law


dNewton’s formula


View Answer Pascal’s law

Capillary action is due to the__________________?


asurface tension


bcohesion of the liquid


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


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


b remain unaffected


c may increase or decrease depending on the characteristics of liquid


ddecrease


View Answer decrease

The units of dynamic or absolute viscosity are_______________?


ametres2 per sec


bkg sec/meter


c newton-sec per meter


dnewton-sec2 per meter



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