Question

The size of Anthracite used in dual media filter is __________

(a) 1-2mm

(b) 1.25-2.5mm

(c) 3-4mm

(d) 4-5mm

I got this question in homework.

I would like to ask this question from Dual Media and Mixed Media Filter in chapter Filtration of Environmental Engineering

Answer 1

The correct option is (b) 1.25-2.5mm

Best explanation: The size of Anthracite used in dual media filter is 1.25-2.5mm and it is placed over a sand of 0.5 to 1mm size.