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UPSC Civil Service Exam Questions - Engineering

Q1:

A sand deposit has a porosity of 1/3 and its specific gravity is 2.5. The critical hydraulic rediant to cause sand boiling in the stratum will be

A 1.5

B 1.25

C 1.0

D 0.75

ANS:C - 1.0

For boiling condition i = (G-1)(1-n).