Soil Mechanics and Foundation
At liquid limit, all soils possess

different shear strengths of large magnitude
same shear strength of small magnitude
different shear strengths of small magnitude
same shear strength of large magnitude

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

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