Question

What is the size of sand used in a dual media filter?

(a) 0.5-1mm

(b) 1-2mm

(c) 2-3mm

(d) 3.5-4mm

I had been asked this question in an online quiz.

I need to ask this question from Dual Media and Mixed Media Filter topic in portion Filtration of Environmental Engineering

Answer 1

Correct answer is (a) 0.5-1mm

The explanation: The size of sand used in a dual media filter is 0.5-1mm and it has a thickness of 20 to 30 cm.