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Soil Mechanics and Foundation Engineering - Engineering

Q1:

The capillary rise of water

A depends upon the force responsible

B increases as the size of the soil particles increases

C decreases as the size of the soil particles decreases

D is less in wet soil than in dry soil.

ANS:A - depends upon the force responsible

Capillary rise = 4 * σ* cos(α)/wd.

Where "σ" sigma is surface tension =force/length.

Capillary rise is directly proportional to surface tension and also surface tension is directly proportional to force so the answer is A. Surface tension depends upon the Cohesion.

And capillary rise depends upon both cohesion and adhesion. H = 4*S*cos theta/density*d*g.

Where S equal to surface tension force.