Non-Destructive Testing (NDT) Practice Test

What are relevant indications of a post FPI/LPI inspection?

1. Only round circles

2. Only continuous lines

3. Round circles, continuous lines, and intermittent lines

4. Any form of discoloration

The correct answer is: Round circles, continuous lines, and intermittent lines

During a post-fluorescent penetrant inspection (FPI) or liquid penetrant inspection (LPI), relevant indications include various forms of surface discontinuities that can be detected by the penetrant method. The correct answer encompasses all potential indications, including round circles, continuous lines, and intermittent lines, which are crucial for identifying relevant surface defects. Round circles typically indicate areas of penetration where a crack or void might be located, while continuous lines can signify longer, uninterrupted defects such as cracks or seams. Intermittent lines are also key, as they may represent surface discontinuities that are not continuous but still significant enough to warrant further investigation. Recognizing these various forms helps inspectors assess the integrity of the material and determine if it meets necessary safety and quality standards. In contrast, the other options suggest a limitation in the types of indications considered relevant. Focusing solely on round circles or continuous lines would overlook critical information provided by other potential indications that could point to serious issues within the material being inspected. Discoloration alone is not a definitive or comprehensive indicator of defects and could result from multiple factors, making it less effective as a standalone criterion for assessment. Understanding the full range of indications enhances the effectiveness of the inspection process and ultimately supports better maintenance and