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UPSC Civil Service Exam Questions - Engineering

Q1:

Laboratory vane shear test can also be used to determine

A Shear parameters of silty sand

B Shear parameters of sandy clay

C Liquid limit of silty clay

D Plastic limit of clayey silt

ANS:D - Plastic limit of clayey silt

The Vane shear test is used to determine the cohesion or shear strength of cohesive clay not for sand.

Hence options A and B are incorrect and used to find the liquid limit also, shear strength at the liquid limit is about 2.7kn/m2.