Question

In a rectangular horizontal flow tank, the maximum permissible velocity is ____ m/Sec.

(a) 3

(b) 0.3

(c) 0.03

(d) 0.003

I got this question at a job interview.

Origin of the question is Design of Sedimentation Tank topic in chapter Sedimentation and Chemical Clarification of Environmental Engineering

Answer 1

Correct choice is (b) 0.3

For explanation I would say: In the rectangular tank, the ideal conditions are that the flow is horizontal, velocity is uniform in all directions and the maximum permissible limit of velocity is 0.03m/Sec.