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

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

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

less than the sum of the discharges from individual wells
sum of the discharges from individual wells
greater than the 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
If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then

The liquid limit of soil always increases
The liquid limit of soil always decreases
The liquid limit of soil may decrease
The liquid limit of soil may increase

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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 decrease
both neutral pressure and effective pressure increase

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