AL Sewer Projects Practice Questions - Alabama Sewer Projects Contractor Examination Exam

What is the primary function of the channel and bench inside a sanitary manhole?

To support the frame and cover against traffic loads To guide flow through the structure, reduce solids deposition, and provide a standing surface To seal the manhole against surface water inflow To provide an air-release point on a force main

Correct Answer:

To guide flow through the structure, reduce solids deposition, and provide a standing surface

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