What do pneumatic schematics represent?

Pneumatic schematics are crucial for understanding the layout and functionality of a pneumatic system. They visually represent the components—such as valves, actuators, and compressors—and how these components are interconnected through tubing and other means. This representation allows individuals working with the system to quickly grasp how air flow is directed, how various components interact, and where potential issues might arise. By illustrating the entire system's configuration, pneumatic schematics facilitate troubleshooting, design modifications, and maintenance. This clarity is vital for anyone involved in operating or maintaining pneumatic equipment, making option C the most accurate answer regarding what pneumatic schematics represent.