What is a general statement about solvent removable penetrants?

• A. Used for inspecting large production lines
• B. Used for inspecting small localized areas when there are only a small number of parts to inspect (spot check)
• C. Best for full-surface inspections
• D. Not suitable for any localized area

Answer: (B)

Solvent removable penetrants are chosen when you want a quick, targeted check on a small number of parts. After applying the penetrant, you wash it away with a solvent, leaving indications only where flaws allowed penetrant to enter. This process is fast and efficient for spot checks because you can focus on just the area of interest and avoid processing a large batch. For large production lines or full-surface inspections, other penetrant types and removal methods are preferred, since removing penetrant from many surfaces with solvent becomes time-consuming and less practical to automate. So the general statement is that solvent removable penetrants are best for inspecting small localized areas when there are only a few parts to inspect.