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

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

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Soil Mechanics and Foundation
Effective stress on soil

Decreases both voids ratio and permeability
Increases both voids ratio and permeability
Decreases voids ratio and increases permeability
Increases voids ratio and decreases permeability

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Soil Mechanics and Foundation
The total discharge from two wells situated near to each other is

greater than the sum of the discharges from individual wells
less than the sum of the discharges from individual wells
sum of the discharges from individual wells
equal to larger of the two discharges from individual wells

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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
a gradual decrease in neutral pressure and a gradual increase 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

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