Question

In which of the following filter, two layers filtering media is provided for filtration?

(a) Slow sand filter

(b) Pressure filter

(c) Rapid sand filter

(d) Dual media filter

I got this question by my college director while I was bunking the class.

This is a very interesting question from Dual Media and Mixed Media Filter topic in division Filtration of Environmental Engineering

Answer 1

Correct choice is (d) Dual media filter

For explanation: In dual media filter, filtration takes place from coarse to fine media by the provision of two layers filtering media called as dual media and that is why it is called as a dual media filter.