Non-Destructive Testing (NDT) Practice Test

What is indicated by the frequency range marked on an absolute probe's handle?

1. Type of flaw to be detected

2. Electromagnetic compatibility

3. Proper probe selection for inspection

4. Maximum distance for inspection

The correct answer is: Proper probe selection for inspection

The frequency range marked on an absolute probe's handle is crucial because it directly relates to the proper application and use of that probe during inspections. Each probe is designed to operate effectively within a specific frequency range that aligns with the type of materials and flaws being examined. In non-destructive testing, the selection of the right probe is essential to achieve optimal results; using a probe outside its designated frequency range may lead to inaccurate readings or the inability to detect certain types of flaws altogether. This is especially relevant in techniques such as ultrasonic testing, where frequency can influence the sensitivity to different sizes of flaws and the penetration depth in various materials. Understanding this frequency information ensures that inspectors make informed decisions on the appropriate probe to use for their specific inspection needs, enhancing the reliability and effectiveness of the NDT process.