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GATE Exam Questions - Engineering

Q1:

The time for a clay layer to achieve 90% consolidation is 15 years. The time required to achieve 90% consolidation; if the layer were twice as thick, 3 times forr permeable and 4 times more compressible would be :

A 70 years

B 75 years

C 80 years

D 85 years

ANS:C - 80 years

Tv = Cv * t/d^2
15/t2 = h/2h.
t2 = 60.
60 * 4/3 = 80 years.