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UPSC Civil Service Exam Questions - Engineering

Q1:

The standard plasticity chart to classify fine grained soils is shown in the given figure. The area marked 'X' represents

A silt of low plasticity

B clay of high plasticity

C organic soil of medium plasticity

D clay of intermediate plasticity

ANS:D - clay of intermediate plasticity

Inorganic clay shows always above the A-line.

Organic silt shows always below the A-line.

Black cotton soil is partially below or partially above the A-line.