Soil Mechanics and Foundation
When the degree of saturation is zero, the soil mass under consideration represents

two phase system with soil and air
three phase system
two phase system with soil and water
one phase system

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Soil Mechanics and Foundation
The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is

Vertical if the soil is in a passive state of plastic equilibrium
None of these
Vertical if the soil is in an active state of plastic equilibrium
Inclined at 45° to the vertical plane

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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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