Soil Mechanics and Foundation
With the increase in the amount of compaction energy

optimum water content increases but maximum dry density decreases
both optimum water content and maximum dry density decrease[ES 93]
both optimum water content and maximum dry density increase
optimum water content decreases but maximum dry density increases

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Soil Mechanics and Foundation
The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing

cohesion and effective angle of shearing resistance
effective angle of shearing resistance
effective unit weight of soil and effective angle of shearing resistance
cohesion and effective unit weight of soil

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Soil Mechanics and Foundation
Which of the following statements is correct?

For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity.
None of these
Uniformity coefficient represents the shape of the particle size distribution curve.
A soil is said to be well graded if it has most of the particles of about the same size

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Soil Mechanics and Foundation
The admixture of coarser particles like sand or silt to clay causes

decrease in both liquid limit and plasticity index
increase in both liquid limit and plasticity index
decrease in liquid limit and increase in plasticity index
decrease in liquid limit and no change in plasticity index

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