Which non-destructive testing technique is well-suited for untrained operators?

Liquid Penetrant Testing is particularly well-suited for untrained operators due to its straightforward process and minimal equipment requirements. This method involves applying a liquid penetrant to the surface of the material, allowing it to seep into any surface-breaking defects. After a set dwell time, excess penetrant is removed, and a developer is applied to help reveal any defects. This process relies on visual inspection, making it accessible even to those without extensive training or technical background.

In contrast, the other methods—Eddy Current, Ultrasonic, and Radiographic Testing—often require specialized training and technical knowledge to interpret results accurately and operate the equipment safely. Eddy Current Testing and Ultrasonic Testing involve more complex equipment and principles that necessitate a deeper understanding of electromagnetism and wave propagation, respectively. Radiographic Testing requires knowledge of radiation safety and the ability to interpret sometimes intricate film results. Thus, while effective, these techniques are less suited for untrained individuals compared to Liquid Penetrant Testing.