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The cement concrete sewers are lined with vitrified clay lining to prevent __________

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in Environmental Engineering by (81.4k points)
The cement concrete sewers are lined with vitrified clay lining to prevent __________

(a) Dampness of sewer

(b) Algae growth in the sewer

(c) Crown corrosion

(d) Foul smell of sewer

The question was posed to me during an online exam.

Enquiry is from Material for Sewers topic in portion Construction of Sewers, Sewer Appurtenances and Sewage Pumping of Environmental Engineering

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Best answer
Correct answer is (c) Crown corrosion

To elaborate: The interiors of the sewers are lined with vitrified clay to prevent corrosion and erosion of sewer.

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