Soil Mechanics and Foundation
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

increases by 33.3%
increases by 50%
decreases by 33.3%
increases by 25%

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

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]
optimum water content increases but maximum dry density decreases

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Soil Mechanics and Foundation
If the water table rises upto ground surface, then the

effective stress is reduced due to decrease in total stress only but pore water pressure does not change
total stress is increased due to decrease in pore water pressure but effective stress does not change
total stress is reduced due to increase in pore water pressure only but effective stress does not change
effective stress is reduced due to increase in pore water pressure only but total stress does not change

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