Non-Destructive Testing (NDT) 2025 – 400 Free Practice Questions to Pass the Exam

Using a high-frequency transducer in ultrasonic testing primarily results in improved resolution of small flaws. This is because higher frequencies generate shorter wavelengths of sound, which allows for better detail in the imaging of the test material. The shorter wavelengths can detect smaller features and irregularities in the material structure, making it possible to identify minute flaws that lower frequency transducers might miss.

While other aspects, such as penetration depth and sensitivity to surface conditions, are also considerations in ultrasonic testing, they are typically affected inversely by frequency. Higher frequencies are generally associated with reduced penetration capabilities due to increased attenuation in materials, thus making them more suitable for detecting finer discontinuities rather than deeper flaws.