Soil Mechanics and Foundation Engineering MCQs

During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm2 to 0.26 N/mm2, the pore water pressure increases from 0.07 N/mm2 to 0.15 “N/mm2. Skempton’s pore pressure parameter B is___________________?

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A. 0.5
B. -0.5
C. 2.0
D. – 2.0
✅ The correct answer is option A.

Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability__________________?

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A. increases by 25%
B. increases by 50%
C. increases by 33.3%
D. decreases by 33.3%
✅ The correct answer is option B.

If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is________________?

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A. less than specific gravity of soil
B. equal to specific gravity of soil
C. greater than specific gravity of soil
D. independent of specific gravity of soil
✅ The correct answer is option B.

Rise of water table above the ground surface causes________________?

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A. equal increase in pore water pressure and total stress
B. equal decrease in pore water pressure and total stress
C. increase in pore water pressure but decrease in total stress
D. decrease in pore water pressure but increase in total stress
✅ The correct answer is option A.