Certified Maintenance & Reliability Professional (CMRP) Practice Exam

What type of analysis uses sound measurements to detect problems in machinery?

1. Vibration Analysis

2. Acoustic / Ultrasonic Analysis

3. Infrared Thermography

4. Electrical Testing

The correct answer is: Acoustic / Ultrasonic Analysis

Acoustic or ultrasonic analysis is a non-destructive testing method that utilizes sound measurements to detect potential issues in machinery. This technique is particularly effective at identifying abnormal sounds, which may indicate problems such as leaks, misalignments, or mechanical wear. By analyzing sound frequencies that are often inaudible to the human ear, technicians can pinpoint faults and assess the condition of equipment without interrupting operations. In practice, ultrasonic analysis involves the use of specialized sensors that capture high-frequency sound waves generated by equipment during its normal operation. These sound waves can provide valuable insights into the integrity of mechanical components, enabling maintenance professionals to take corrective actions before a failure occurs. This method differs from vibration analysis, which focuses on the movement and oscillations of machinery, and infrared thermography, which detects heat patterns to identify issues. Electrical testing assesses the condition of electrical components and systems, but does not involve the analysis of sound for diagnosing mechanical problems. Thus, the use of sound measurements through acoustic or ultrasonic analysis is uniquely suited for detecting issues in machinery.