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

What is an advantage of emulsifier application by dipping?

1. Excess penetrant is recovered in the emulsifier tank and reprocessed

2. All of the test object is coated at approximately the same time

3. Excess emulsifier drains back into the emulsifier tank for re-use

4. Hydrophilic scrubbing is then easier to perform

The correct answer is: All of the test object is coated at approximately the same time

The application of emulsifier by dipping offers the advantage that all surfaces of the test object are coated uniformly and simultaneously. This is particularly beneficial when testing larger components or those with intricate geometries, as it ensures consistent treatment across the entire surface. The uniform application helps to maintain control over the testing process, minimizing variables that could lead to uneven emulsification and enhancing the reliability of the results. In addition, dipping streamlines the application process, reducing the time required to complete the testing and ensuring that even hard-to-reach areas are effectively treated. This comprehensive coating is essential for creating the optimum conditions for defect visibility after the penetrant has been processed, ultimately leading to more accurate evaluations.