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What is the size of the coarse screen used in pretreatment of water?

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+1 vote
in Environmental Engineering by (81.4k points)
What is the size of the coarse screen used in pretreatment of water?

(a) 25mm

(b) 50mm

(c) 75mm

(d) 100mm

The question was posed to me in an interview for job.

My doubt is from Types of Screens and Aerators topic in division Unit Operations, Screening and Aeration of Environmental Engineering

1 Answer

+2 votes
by (693k points)
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Best answer
Right choice is (a) 25mm

To explain: Coarse screens are used in the form of bars of 25mm diameter size and are spaced at 75 to 100mm centers.

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