When performing a vibration analysis for rotating machinery, what is essential?

Correct Answer: Option B — A baseline vibration signature should be established as a reference, and a historical record of periodic analyses should be maintained. Vibration amplitudes at various frequencies are compared.

Under USCG National Maritime Center examination standards, the accepted correct answer is: A baseline vibration signature should be established as a reference, and a historical record of periodic analyses should be maintained. Vibration amplitudes at various frequencies are compared..