Visual Testing (VT) Practice Exam

What is required for effective visual inspections regarding lighting conditions?

1. Minimum of 100 ftc illumination

2. Minimum of 200 ftc illumination

3. Minimum of 500 ftc illumination

4. Minimum of 1000 ftc illumination

The correct answer is: Minimum of 200 ftc illumination

For effective visual inspections, the requirement for lighting conditions plays a critical role in ensuring that inspectors can accurately assess and identify any visual discrepancies or defects. A minimum of 200 foot-candles (ftc) of illumination is typically recommended for various inspection activities, as this level of lighting provides sufficient visibility to discern details without causing strain on the eyes. Having 200 ftc allows inspectors to clearly see the fine details and textures on surfaces, making it easier to spot any irregularities, discrepancies, or flaws. This level of illumination strikes a balance between being bright enough to provide good visibility while not being so bright that it leads to glare or reflections that can impede the inspection process. In contrast, options indicating levels of illumination either lower than or significantly higher than 200 ftc may not align with the optimal conditions established for effective visual inspections, leading to unsatisfactory results.