True or False: Impeller pumps may be damaged by running dry.

Impeller pumps can indeed be damaged by running dry, making the assertion true. When an impeller pump operates without sufficient fluid, it lacks the necessary lubrication and cooling that the fluid typically provides. This can lead to overheating, excessive wear, and ultimately, failure of the pump components.

Without the fluid to assist with the hydraulic balance, the rotating parts can experience increased friction and degradation. In the absence of monitoring, the consequences of dry running may go unnoticed until significant damage has occurred. Therefore, it's vital to ensure that impeller pumps are always primed with the appropriate fluid to prevent such damage.

This understanding highlights the importance of regular maintenance and monitoring in systems using impeller pumps to ensure they operate efficiently and avoid costly repairs or replacements.