What can excessive moisture in a pneumatic system lead to?

Excessive moisture in a pneumatic system can lead to corrosion and malfunction of components due to the interaction between water and metals used in the system. When moisture accumulates, it can promote rust and corrosion, particularly in metallic parts such as cylinders, valves, and pipes. This deterioration weakens components, potentially leading to leaks, loss of efficiency, and even full equipment failure over time. Additionally, moisture can cause other issues such as freezing in cold environments, which can further disrupt system operation.

In contrast, other outcomes presented in the choices are not supported by the reality of how moisture affects pneumatic systems. Improved performance and increased efficiency are unlikely since moisture brings a range of problems that hinder the smooth operation of pneumatic components. Similarly, extended lifespan of equipment would be compromised due to the adverse effects of moisture-related damage.