Final answer:
Both self-priming and manual priming pumps benefit from being primed, which is true. Priming is necessary to remove air and ensure efficient operation, reducing the risk of cavitation damage. Option (A)
Step-by-step explanation:
The statement that both self-priming and manual priming pumps benefit from being primed is true. Priming a pump is the process of removing air from the pump casing and the suction line, to allow for the fluid to flow smoothly. For a self-priming pump, the ability to prime itself does require an initial fluid level inside the casing to create the necessary vacuum to draw more fluid. In the case of manual priming, a user must actively fill the pump casing and suction line with fluid before it can operate effectively. Without priming, air in the pump casing can prevent the creation of a vacuum, hindering fluid flow and potentially causing cavitation damage in the pump. Therefore, while self-priming pumps are designed to handle air in the suction line by evacuating it themselves after initial priming, both types of pumps operate best when they have been properly primed before use.