2.5 to 3.0 m/sec
3.0 to 4.0 m/sec
3.5 to 4.5 m/sec
4.5 to 5.5 m/sec
Answer is Right!
Answer is Wrong!
The correct answer is: A. 2.5 to 3.0 m/sec.
Cement concrete sewers are only suitable if the non-scouring velocity is between 2.5 to 3.0 m/sec. This is because the non-scouring velocity is the minimum velocity required to prevent the sediment from being scoured away from the sewer. If the velocity is too low, the sediment will settle and build up in the sewer, which can lead to blockages and other problems.
The other options are incorrect because they are not within the range of non-scouring velocities for cement concrete sewers. Option B is too high, and options C and D are too low.
It is important to note that the non-scouring velocity can vary depending on the type of
sediment, the size of the sewer, and other factors. It is always best to consult with a qualified engineer to determine the appropriate non-scouring velocity for a particular sewer.