It is cheaper in construction
It provides maximum area for a given perimeter
It provides maximum hydraulic mean depth
All the above
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Answer is Wrong!
The correct answer is: D. All of the above.
A circular sewer section is preferred to other shapes because it is cheaper in construction, provides maximum area for a given perimeter, and provides maximum hydraulic mean depth.
- Cheaper in construction. A circular sewer section requires less material than other shapes, such as a square or rectangular section. This is because the circumference of a circle is less than the perimeter of a square or rectangle with the same area.
- Maximum area for a given perimeter. A circular sewer section has the largest area for a given perimeter. This means that it can carry more water for a given amount of material.
- Maximum hydraulic mean depth. The hydraulic mean depth is a measure of the efficiency of a sewer section. It is calculated by dividing the cross-sectional area of the sewer by the wetted perimeter. A circular sewer section has the maximum hydraulic mean depth of any shape. This means that it can carry water with the least amount of friction.
In conclusion, a circular sewer section is preferred to other shapes because it is cheaper in construction, provides maximum area for a given perimeter, and provides maximum hydraulic mean depth.