Question

The depth of an enclosed tank of a slow sand filter lies in the range of  ______

(a) 1-2m

(b) 2.5-4m

(c) 2-5m

(d) 3-5m

The question was asked in an interview for internship.

I want to ask this question from Slow Sand Filter topic in portion Filtration of Environmental Engineering

Answer 1

Correct choice is (b) 2.5-4m

The best I can explain: The depth of an enclosed tank of a slow sand filter lies in the range of 2.5-4m and its surface area lies between 50-1000m^2.