State the correct answer in your answer book along with the qucstion number (i)

Question

State the correct answer in your answer book along with the qucstion number (i) The vertical stress in a uniform sandy deposit due to the construction of T a ten storey structure increases with the depth (ii) The effective cohesion in a normally consolidated clay slurry sample measured in the laboratory using triaxial tests is typically close to zero At the liquid limit value, the shear strength of an expansive clay (liquid T limit 82%) is the same as the shear strength of a silty clay (liquid limit-35.5%) iv) The pore-water pressures are likely to be negative in a typical overconsolidated clay sample when thcy arc subjected to loading in a triaxial test apparatus with a confining pressure lower than its pre- consolidation pressure (v) The pore-water pressure is always positive in a normally consolidated clay sample tested in a triaxial test apparatus irrespective of the applied contining pressure (vi) The zero-air voids line plotted on a compaction curve for fine-grained soil is typically parallel to the wet of optimum moisture content line (or curve) and is always above it. (vii Well graded sand has a higher coefficient of permeability in comparison to uniform sand. (vii) Vane shear tests can be used to determine the shear strength of saturated clays under drained loading conditions. (ix) The direct shear test apparatus is useful for determining the undrained TF cohesive strength, c of a soft clay sample. (x) The strength parameters have to be determined under consolidated drained loading conditions to estimate the short term stability of a homogenous earth dam constructed using homogeneous clay

Explanation / Answer

1) True

Vertical stress = Unit weight * Depth

Vertical stress increases with increase in depth

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