Soil Mechanics and Foundation
The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively

zero and zero
1.0 kg/cm² and 0.5 kg/cm²
0.5 kg/cm² and 0.5 kg/cm²
0.5 kg/cm² and zero

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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.
A soil is said to be well graded if it has most of the particles of about the same size
None of these
Uniformity coefficient represents the shape of the particle size distribution curve.

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

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

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