What is the standard unit of measure for vibration displacement?

Correct Answer: Option B — Thousandths of an inch (0.001), peak to peak.

Vibration displacement measures the total distance a vibrating part travels from its extreme positive position to its extreme negative position. In industrial predictive maintenance, this is standardly expressed in mils, where one mil equals 0.001 inches, providing a peak-to-peak measurement of the mechanical motion.