Which of the following is NOT a typical symptom of a misaligned machine?

Misalignment of machines is a common issue that can result in several detrimental symptoms. One of the key indicators of misalignment is excessive vibration. When components are not properly aligned, the imbalance leads to oscillations that can be measured as vibrations. This is indicative of the physical stress and strain that misalignment places on the machinery.

Another common symptom is noise. Misalignment can create undue friction between parts that are meant to work in harmony, generating unexpected sounds that can signal machinery issues. This not only affects performance but can also indicate potential wear and tear on machine components.

Furthermore, reduced operational efficiency is a critical symptom of misalignment. When machines are not positioned correctly, they cannot function at optimal levels, resulting in lower productivity and performance.

In contrast, increased energy efficiency is not a symptom of misalignment. In fact, misalignment typically leads to increased energy consumption due to the additional work required for misaligned components to function. Therefore, the correct choice highlights that increased energy efficiency is not associated with misalignment, but rather it tends to have the opposite effect.