Question

When Yo = Yc, it is called ________

(a) Adverse

(b) Horizontal

(c) Critical

(d) Mild

This question was addressed to me by my college director while I was bunking the class.

This interesting question is from Relation between Water Surface Slopes and Channel Bottom Slopes topic in section Non Uniform Flow in Channels of Fluid Mechanics

Answer 1

Right option is (c) Critical

Best explanation: When Yo= Yc, it is called a Critical slope. Critical slopes are denoted by the letter ‘c’. Critical slopes like the other slopes have three depth zones that help to determine the water surface flow.