Question

In transition of sewers from smaller diameter sewers to larger diameter sewers, the continuity of sewers is maintained at the ...........

• A. bottom of the concrete bed of sewers
• B. inverts of the sewer
• C. crowns of the sewers
• D. hydraulic gradients of the sewers

Hint:

In sewer design, the invert level is critical for ensuring smooth flow and avoiding turbulence or sediment deposition during transitions in pipe diameter.

Answer 1

The Correct Option is B

When transitioning from smaller to larger diameter sewers, it is important to maintain a smooth and continuous flow of wastewater. This is achieved by aligning the inverts (the lowest interior points) of the sewers. If the inverts are not matched, it can result in flow disruption, backflow, or sediment deposition.
Maintaining continuity at the invert level ensures a uniform slope and hydraulic gradient for consistent flow.
Hence, the correct answer is (2) inverts of the sewer.