Which of the following best describes what occurs during vibration monitoring?

Vibration monitoring encompasses a range of techniques focused on analyzing the vibrational characteristics of machinery and structures. The correct response highlights that velocity, displacement, and acceleration are all vital parameters that can be measured during this process.

Each of these measurements provides critical insights into the condition of the equipment. Velocity is often associated with the overall severity of vibration, displacement is relevant for identifying misalignment or unbalance in machinery, and acceleration indicates the frequency content of the vibrations, which can reveal resonance issues or mechanical impacts. By measuring all three parameters, vibration monitoring provides a comprehensive view of the health and operational status of rotary machinery, ensuring that any potential issues can be identified and addressed promptly.

The other options don't encompass the full scope of what vibration monitoring entails, focusing either too narrowly on specific measurements or other factors that do not directly relate to the core parameters associated with monitoring machinery vibrations.