While examining vibration analysis of a particular piece of rotating machinery, one of the measurement location readings exhibits high amplitude/displacement in vertical and horizontal direction at 2 X RPM frequency. What would this indicate?

Correct Answer: Option D — Misalignment.

High vibration amplitude at 2X the rotational frequency (2X RPM) is a classic diagnostic indicator of angular or parallel misalignment. While imbalance typically manifests at 1X RPM, misalignment forces the coupling to flex twice per revolution, creating the characteristic double-frequency peak in the vibration spectrum analysis.