In vibration analysis, which fault is commonly detected before failure occurs?

In vibration analysis, which fault is commonly detected before failure occurs?

• A. Color of paint.
• B. Imbalance.
• C. Ambient temperature.
• D. Noise level.

Answer: (B)

Vibration analysis looks for patterns in how a machine vibrates to detect issues before parts fail. An imbalance—uneven mass distribution on a rotating part—creates a steady forcing at the rotor’s speed, producing a vibration signal that sensors can easily pick up and that tends to grow with RPM. Because this fault shows up as a clear, early-change in vibration levels, it’s commonly detected before any mechanical failure occurs. The other options aren’t useful indicators in this context: color of paint doesn’t reflect mechanical health, ambient temperature is a thermal/environmental cue rather than a vibration symptom, and general noise level isn’t specific to rotating-machine faults.

Vibration analysis looks for patterns in how a machine vibrates to detect issues before parts fail. An imbalance—uneven mass distribution on a rotating part—creates a steady forcing at the rotor’s speed, producing a vibration signal that sensors can easily pick up and that tends to grow with RPM. Because this fault shows up as a clear, early-change in vibration levels, it’s commonly detected before any mechanical failure occurs. The other options aren’t useful indicators in this context: color of paint doesn’t reflect mechanical health, ambient temperature is a thermal/environmental cue rather than a vibration symptom, and general noise level isn’t specific to rotating-machine faults.