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UPSC Civil Service Exam Questions - Engineering

Q1:

A soil has liquid limit of 60%, plastic limit of 35% and shrinkage limit of 20% and it has a natural moisture content of 50%. The liquidity index of soil is

A 1.5

B 1.25

C 0.6

D 0.4

ANS:C - 0.6

IL=w-Wp ÷ Wl-Wp.
= (.50-.35) ÷ (.60-.35) = 0.6.