Liquid Penetrant Testing Level 2 (PT-2) Practice Exam

How should dried, non-aqueous developers be best removed after penetrant testing?

1. Solvent cleaning

2. Wiping with a water dampened cloth

3. Wiping with a dry towel

4. Any of the above

The correct answer is: Any of the above

Dried, non-aqueous developers can indeed be removed using any of the listed methods because they are typically designed to be more versatile in their removal. Solvent cleaning is particularly effective as solvents can dissolve the dried developer, making it easier to clean surfaces without damaging the underlying material. Wiping with a water-dampened cloth can also work effectively, especially if the developer is formulated to be somewhat water-soluble or if residues can be managed with moisture. Using a dry towel can remove loose particles and most of the developer, although it may not be as thorough as the other methods. This flexibility in removal methods allows for adaptability in various settings and ensures that operators can select a method that best suits their specific testing conditions and materials involved, thereby not compromising the integrity of the parts being tested. Therefore, the answer indicates that any of these methods can be employed to achieve proper cleaning.