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UPSC Civil Service Exam Questions - Engineering

Q1:

Flow happens at a critical depth of 0.5 m in a rectangular channel of 4 m width. What is the value of discharge ?

A 5.4 m3/s

B 5.1 m3/s

C 4.9 m3/s

D 4.4 m3/s

ANS:D - 4.4 m3/s

Yc = (q^2/g)^1/3.
q = 1.107,
Q = qb.
= 1.107x4 = 4.4.