Soil Mechanics and Foundation
The slope of isochrone at any point at a given time indicates the rate of change of

effective stress with time
pore water pressure with time
pore water pressure with depth
effective stress with depth

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Soil Mechanics and Foundation
In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as

unconsolidated drained test
consolidated undrained test
unconsolidated undrained test
consolidated drained test

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

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

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