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UPSC Civil Service Exam Questions - Engineering

Q1:

The sequent depth ratio in a hydraulic jump formed in a horizontal rectangular channel is 16.48. The flow is supercritical. What is the value of the Froude number of flow ?

A 4.0

B 8.0

C 12.0

D 120.0

ANS:C - 12.0

16.49 = 1/2[-1+√1+8F^2].
32.96+1 = √1+8F^2.
√F= 144.
F = 12.