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UPSC Civil Service Exam Questions - Engineering

Q1:

For medium silt where average grain size is 0.16 mm, Lackey's silt factor is likely to be

A 0.30

B 0.45

C 0.70

D 1.32

ANS:C - 0.70

1.76√(d).
D = in mm.
So C is the right answer.