Environmental Engineering
An egg shaped section of sewer

Is easy to construct
Provides self cleansing velocity at low discharges
Is economical than circular section
Is more stable than circular section

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Environmental Engineering
Assertion A: Slow sand filters are more efficient in removal of bacteria than rapid sand filters.Reason R: The sand used in slow sand filters is finer than that in rapid sand filtersSelect your answer based on the coding system given below:

A is true but R is false
Both A and R is true but R is not the correct explanation of A
A is false but R is true
Both A and R is true and R is the correct explanation of A

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