AMPP Basic Corrosion Certification Practice Exam

Dye penetrant inspection is a widely used non-destructive testing method designed to detect surface-breaking defects in non-porous materials. While it is a valuable technique, one of its limitations is that it requires personnel to undergo specific training to correctly apply the method and interpret the results effectively. Understanding the chemical properties of the penetrants, how to prepare the surface, and how to properly perform the inspection are critical aspects that necessitate training. This ensures accurate results and minimizes the risk of overlooking defects.

The other choices illustrate factors that do not represent limitations of dye penetrant inspection. For example, the method does not make surface defects harder to see; in fact, it enhances visibility. It also does not work on porous materials, as these can absorb the dye and obscure the results. Additionally, dye penetrant inspection is specifically designed to identify surface defects, and does not have the capability to analyze internal defects.