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UPSC Civil Service Exam Questions - Engineering

Q1:

A soil has a liquid limit of 45% and lies above the A-line when plotted on a plasticity chart. The group, symbol of the soil as per Soil Classification is

A CH

B CI

C CL

D MI

ANS:B - CI

Taking U line equation = 0.9(WL-8).
=0.9(45-8)=33.3.

Hence above A line we know its clay so by 33.3 it is between 30 to 50 liquid limit range. Hence
it's Clay intermediate.