Soil Mechanics and Foundation
Effective stress is

a physical parameter that can be measured
the stress at particles contact
All of these
important because it is a function of engineering properties of soil

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Soil Mechanics and Foundation
In hydrometer analysis for a soil mass

meniscus correction is subtractive and dispersing agent correction is additive
meniscus correction is additive and dispersing agent correction is subtractive
both meniscus correction and dispersing agent correction are subtractive
both meniscus correction and dispersing agent correction are additive

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Soil Mechanics and Foundation
The average coefficient of permeability of natural deposits

Parallel to stratification may or may not be greater than that perpendicular to stratification
Parallel to stratification is always less than that perpendicular to stratification
Parallel to stratification is always greater than that perpendicular to stratification
Is always same in both directions

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