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GATE Exam Questions - Engineering

Q1:

Water flows at a rate of 10 m3/s in a rectangular channel 3 m wide. The critical depth of flow is

A 1.13 m

B 2 m

C 1.45 m

D 1.04 m

ANS:D - 1.04 m

We know that.
hc= (q2/g)1\3.

Therefore,
q = Q\wide.
q =10/3.

When,
q = 3.33.

Then,
hc = (3.33^2 /9.81)^1\3.
hc = 1.04 m.