Liquid Penetrant Testing Level 1 (PT-1) Practice Exam

What potential damage does black light with a proper functioning filter in place cause during fluorescent penetrant inspection?

1. It may cause temporary dark spots on the eyes

2. It can cause permanent damage

3. It does not cause permanent damage

4. It is safe to look at directly

The correct answer is: It does not cause permanent damage

During fluorescent penetrant inspection, the use of black light with a properly functioning filter does not cause permanent damage to the eyes. The purpose of the filter is to block out harmful wavelengths of light, particularly ultraviolet (UV) radiation, while allowing the visible fluorescent light to pass through. This means that while some temporary effects, such as temporary dark spots on the eyes, may occur due to bright flashes of light or prolonged exposure, these effects are not permanent. The filter's design is crucial for safety in operations involving fluorescent penetrants. Providing adequate protection means that operators can safely observe the inspection process without suffering irreversible harm. However, standard practice still emphasizes wearing appropriate eye protection to minimize the risk of exposure and ensure overall safety.