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The thickness of the manhole frame is __________

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+2 votes
in Environmental Engineering by (81.4k points)
The thickness of the manhole frame is __________

(a) 10cm

(b) 15cm

(c) 20cm

(d) 40cm

The question was posed to me in an interview.

Query is from Devices Associated with Sewer in chapter Construction of Sewers, Sewer Appurtenances and Sewage Pumping of Environmental Engineering

1 Answer

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Best answer
Right choice is (c) 20cm

The explanation is: The manhole frame is made of cast iron having 10cm width and the thickness is 20cm.

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