Regarding relief valves and check valves in pneumatic systems, which statement is correct?

The statement indicating that both relief valves and check valves are true is accurate because both types of valves serve essential and distinct functions in pneumatic and hydraulic systems.

Relief valves are designed to protect systems from excessive pressure by diverting or venting the flow of fluid when pressure exceeds a predetermined level. This safeguarding mechanism prevents potential damage to the system and maintains operational integrity.

On the other hand, check valves allow fluid to flow in one direction while preventing backflow. This is critical in maintaining system efficiency and preventing damage that can occur due to reverse flow, which can compromise the function of the tools and components within the system.

Understanding both of these components is crucial for the effective design and management of hydraulic and pneumatic systems. Their combined roles ensure that systems operate safely and efficiently, reinforcing the importance of both relief and check valves.