The correct answer is A. Centrifugal pump.
A centrifugal pump is a type of pump that uses centrifugal force to move fluids. It has a rotating impeller that throws the fluid outward, creating a pressure difference that causes the fluid to flow. Centrifugal pumps are typically used for pumping liquids, but they can also be used to pump solids.
A pneumatic ejector is a type of pump that uses compressed air to move fluids. It has a nozzle that is connected to a source of compressed air. When the compressed air is released, it creates a vacuum that draws the fluid into the nozzle. The fluid is then discharged through a discharge pipe. Pneumatic ejectors are typically used for pumping sewage and other waste fluids.
A reciprocating pump is a type of pump that uses a piston to move fluids. It has a cylinder with a piston that moves up and down. When the piston moves up, it creates a vacuum that draws the fluid into the cylinder. When the piston moves down, it forces the fluid out of the cylinder. Reciprocating pumps are typically used for pumping liquids, but they can also be used to pump solids.
The answer is A. Centrifugal pump because it is the only type of pump that can handle the high solids content of sewage without clogging.