Which of the following is NOT a test that can be performed on a fluid power component?

The correct choice indicates an activity that is not classified as a formal test. Inspecting O-rings for wear, while an important maintenance task, is primarily a visual inspection rather than a test that evaluates the component's functional performance in the context of its operational capabilities.

Tests such as running the system through its operating sequence, operating valves manually, and measuring pressure at test points are all methods designed to assess the performance and reliability of fluid power components. These activities entail actual functioning and operational scenarios, which provide valuable insight into how well the components perform under various conditions. By contrast, simply inspecting O-rings does not evaluate their contribution to system performance but rather focuses on their physical condition, therefore it does not fit the definition of a performance test.