Non-Destructive Testing (NDT) Practice Test

Which method of removal is considered solvent removable?

1. Method A

2. Method B

3. Method C

4. Method D

The correct answer is: Method C

Solvent removal refers to a process where constituents, such as contaminants, coatings, or residues, are dissolved and removed using a chemical solvent. In the context of non-destructive testing and surface preparation, solvent removal is essential for ensuring that the surfaces being tested are free from substances that could affect the results, such as oils, greases, or other residues. When identifying which method is solvent removable, consider the characteristics and applications of each method. The correct choice is recognized as involving the use of a solvent that effectively dissolves the unwanted material without damaging the substrate or altering the properties of the material being tested. This approach is commonly employed in scenarios where precision and cleanliness are paramount, as solvents can efficiently remove contaminants that may obscure defects or alter test results. It's important to use the appropriate solvent for the specific material and contaminant to ensure safety and efficacy in the removal process. In contrast, other methods may involve physical means like abrasives or mechanical actions, which do not classify under solvent removal, focusing instead on scraping, wiping, or blasting away contaminants. These methods are valuable but offer a different advantage compared to the selective and chemical nature of solvent removal used to prepare surfaces for accuracy in testing procedures.