ANS:B - centrifugal

The type of pump used for lifting large quantities of sewage is a centrifugal pump. Centrifugal pumps are commonly used in sewage and wastewater treatment plants for lifting and transferring large volumes of sewage or wastewater. These pumps work by converting mechanical energy from a motor or engine into kinetic energy in the fluid being pumped. They operate by spinning an impeller which creates a centrifugal force that propels the fluid outward, thereby increasing its velocity and pressure, allowing it to be lifted or transported through pipes or channels. Centrifugal pumps are preferred for sewage applications due to their ability to handle large flow rates and solids-laden fluids efficiently. They are also relatively simple in design, easy to install, and require minimal maintenance compared to other types of pumps. Therefore, in sewage lifting applications, centrifugal pumps are the most commonly used type of pump.