Soil Mechanics and Foundation
Highway Research Board (HRB) classification of soils is based on

both particle size composition and plasticity characteristics
plasticity characteristics
particle size composition
None of these

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Soil Mechanics and Foundation
Within the consolidation process of a saturated clay

a gradual increase in neutral pressure and a gradual decrease in effective pressure takes place and sum of the two is constant
both neutral pressure and effective pressure increase
both neutral pressure and effective pressure decrease
a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant

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