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UPSC Civil Service Exam Questions - Engineering

Q1:

A deposit of fine sand has a porosity 'n' and specific gravity of soil solids is G. The hydraulic gradient of the deposit to develop boiling condition of sand is given by

A ic = (G - 1)(1 - n)

B ic = (G - 1)(1 + n)

C

D

ANS:A - ic = (G - 1)(1 - n)

Put the value of e=n/n-1 in the formula of ic = (G-1)/(1+e).