When using solvent-removable penetrants, the excess penetrant may be removed by

When using solvent-removable penetrants, the excess penetrant may be removed by

• A. Wiping the part with a rag dampened with solvent.
• B. Rinsing with water.
• C. Dry rubbing with a cloth.
• D. Heating the part to evaporate solvent.

Answer: (A)

For solvent-removable penetrants, you remove the excess material with a cloth dampened by the same solvent used in the process. The solvent dissolves the surface layer of penetrant, so wiping with a solvent-dampened rag effectively clears the surface residue without pulling the penetrant out of any flaws that are still filled. This keeps the penetrant in cracks or defects intact so it can be revealed later by the developer. Using water to rinse isn’t appropriate here because this type of penetrant isn’t designed to be removed by water; it can leave surface residues or wash away material that should stay in the defects. Dry rubbing with a dry cloth may smear or spread the penetrant and won’t reliably remove the surface excess. Heating to evaporate the solvent isn’t the correct removal step and can cause uncontrolled evaporation or damage the surface, potentially affecting the indication.

For solvent-removable penetrants, you remove the excess material with a cloth dampened by the same solvent used in the process. The solvent dissolves the surface layer of penetrant, so wiping with a solvent-dampened rag effectively clears the surface residue without pulling the penetrant out of any flaws that are still filled. This keeps the penetrant in cracks or defects intact so it can be revealed later by the developer.

Using water to rinse isn’t appropriate here because this type of penetrant isn’t designed to be removed by water; it can leave surface residues or wash away material that should stay in the defects. Dry rubbing with a dry cloth may smear or spread the penetrant and won’t reliably remove the surface excess. Heating to evaporate the solvent isn’t the correct removal step and can cause uncontrolled evaporation or damage the surface, potentially affecting the indication.