Which statement best describes a force main?

Which statement best describes a force main?

• A. A pressurized sewer buried underground
• B. A storage tank at plant
• C. A discharge pipe to river
• D. A pump station control room

Answer: (A)

Think of how wastewater is moved through a system. A force main is a pipe that carries wastewater under pressure, pumped from a lift station and usually buried underground. That’s why describing it as a pressurized sewer buried underground fits best. It emphasizes both the need for pumping to move the flow and the underground, protected route. The other descriptions point to something different: a storage tank at the plant is just holding wastewater, not conveying it under pressure; a discharge pipe to a river is an outlet for treated effluent rather than a pressurized conveyance; a pump station control room houses the equipment that operates the system, not the pipe that moves the waste.

Think of how wastewater is moved through a system. A force main is a pipe that carries wastewater under pressure, pumped from a lift station and usually buried underground. That’s why describing it as a pressurized sewer buried underground fits best. It emphasizes both the need for pumping to move the flow and the underground, protected route.

The other descriptions point to something different: a storage tank at the plant is just holding wastewater, not conveying it under pressure; a discharge pipe to a river is an outlet for treated effluent rather than a pressurized conveyance; a pump station control room houses the equipment that operates the system, not the pipe that moves the waste.