Waste Water Engineering
The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is

1 in 503 upward
1 in 100 downward
1 in 100 upward
1 in 500 upward

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Waste Water Engineering
The sewer pipes

Should resist the wear and tear caused due to abrasion
All listed here
Carry sewage as gravity conduits
Are designed for generating self-cleansing velocities at different discharge

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