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In which type of under drainage system of rapid sand filter, laterals are provided with strainers?

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in Environmental Engineering by (81.4k points)
In which type of under drainage system of rapid sand filter, laterals are provided with strainers?

(a) Perforated pipe system

(b) Pipe and strainer system

(c) Wheeler system

(d) Wagner system

I have been asked this question in semester exam.

Asked question is from Rapid Sand Filter in portion Filtration of Environmental Engineering

1 Answer

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Best answer
Correct choice is (b) Pipe and strainer system

The explanation: In Perforated pipe system, laterals are provided with strainers. Strainers are made of brass or bronze and are in umbrella shape, having a small perforation. They distribute the wash water without jet action.

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