Q1: Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is

ANS:A - centrifugal pump

The correct answer is none of these options. Centrifugal pumps are commonly used for pumping liquids, but they are not typically used for pumping sewage solids with liquid sewage without clogging. They are prone to clogging when dealing with solid materials. Pneumatic ejectors are also not suitable for pumping sewage solids with liquid sewage without clogging. They are typically used for moving liquids or gases using compressed air. Reciprocating pumps, while they can handle solids better than centrifugal pumps, may still face challenges with pumping sewage solids without clogging, especially if the solids are large or have a high concentration. For pumping sewage solids with liquid sewage without clogging, specialized pumps such as sewage pumps or grinder pumps are often used. These pumps are designed specifically to handle solids and prevent clogging.