Question

The greater is the divergence from the streamline flow, greater is the contraction coefficient.

(a) True

(b) False

This question was posed to me in an online interview.

My question comes from Ogee Profile in division Spillways, Energy Dissipators and Spillway Gates of Irrigation Engineering

Answer 1

Right answer is (a) True

To explain I would say: The greater is the divergence, the greater is the contraction coefficient and lesser is the effective length of the crest. A 90° cut water nose pier is generally preferred as it has quite a low value of pier contraction coefficient and is most efficient.