Question

When the depth is normal, which parameter is zero?

(a) Pressure

(b) Temperature

(c) Volume

(d) Acceleration

I have been asked this question during an interview.

I'm obligated to ask this question of Characteristics of Surface Profiles topic in chapter Non Uniform Flow in Channels of Fluid Mechanics

Answer 1

Right answer is (d) Acceleration

The best explanation: Normal depth is a depth of flow in the channel. It is created when the slope of the water surface and channel bottom is the same and the water depth remains the same throughout the entire flow. During a normal formation of a normal depth, there is no acceleration of flow.