Usually, the most desirable method of removing excess water-washable penetrant after the dwell time is by using

Usually, the most desirable method of removing excess water-washable penetrant after the dwell time is by using

• A. High pressure water jet
• B. Absorbent paper
• C. A low pressure coarse water spray
• D. Solvent wipe

Answer: (C)

After the dwell, the goal is to remove the surface penetrant without disturbing what has seeped into discontinuities. A low-pressure, coarse water spray is best for this. The gentle, energy-limited spray lifts and washes away the excess surface penetrant while minimizing the chance of dislodging penetrant from cracks or features that show up as indications. The coarse droplets reduce the risk of forcing penetrant deeper into tiny flaws or splashing it across the surface, which could blur or spread indications. Using a high-pressure water jet would deliver too much energy, potentially washing penetrant out of defects, damaging the surface, or creating misleading indications. Absorbent paper can remove some surface material but isn’t reliable for clearing penetrant that has entered small openings and can leave fibers behind. A solvent wipe isn’t appropriate for water-washable penetrants and can leave residues or alter the penetrant film, affecting the inspection.

After the dwell, the goal is to remove the surface penetrant without disturbing what has seeped into discontinuities. A low-pressure, coarse water spray is best for this. The gentle, energy-limited spray lifts and washes away the excess surface penetrant while minimizing the chance of dislodging penetrant from cracks or features that show up as indications. The coarse droplets reduce the risk of forcing penetrant deeper into tiny flaws or splashing it across the surface, which could blur or spread indications.

Using a high-pressure water jet would deliver too much energy, potentially washing penetrant out of defects, damaging the surface, or creating misleading indications. Absorbent paper can remove some surface material but isn’t reliable for clearing penetrant that has entered small openings and can leave fibers behind. A solvent wipe isn’t appropriate for water-washable penetrants and can leave residues or alter the penetrant film, affecting the inspection.