Which of the following indicates that a machine may be suffering from misalignment?

Uneven wear on parts is a strong indicator that a machine may be suffering from misalignment. Misalignment occurs when the machine components are not properly aligned along their axes, which can lead to uneven forces acting on the machine parts as they operate. This misdistribution of forces can cause certain areas to wear down more rapidly than others, resulting in uneven wear patterns.

In contrast, options such as low energy consumption, check engine light activation, or stable operation do not specifically indicate misalignment. Low energy consumption may reflect efficient functioning of the machine but does not relate to the alignment of parts. A check engine light could indicate various issues unrelated to alignment, such as engine performance or sensor problems. Lastly, stable operation suggests that the machine is functioning smoothly, which typically implies correct alignment, rather than the instability that misalignment brings.