When classifying penetrants by the method used to remove excess penetrant, which of the following is a proper classification?

When classifying penetrants by the method used to remove excess penetrant, which of the following is a proper classification?

• A. Solvent-washable
• B. Water-washable
• C. Foam-washable
• D. Air-dried

Answer: (B)

Classification by removal method focuses on how you remove excess penetrant after it has dwell time. Water-washable penetrants are designed to be rinsed away with water, which efficiently removes the surface penetrant while leaving indications visible inside flaws. This makes water washing a simple, common step in many LPI procedures. Foam-washable isn’t a standard category for removing penetrant, and air-dried would imply there’s no washing step at all, which wouldn’t properly remove excess penetrant. The typical recognized removal methods include water-washable, solvent-removable, and post-emulsifiable types; among the options given, water-washable is the proper classification.

Classification by removal method focuses on how you remove excess penetrant after it has dwell time. Water-washable penetrants are designed to be rinsed away with water, which efficiently removes the surface penetrant while leaving indications visible inside flaws. This makes water washing a simple, common step in many LPI procedures. Foam-washable isn’t a standard category for removing penetrant, and air-dried would imply there’s no washing step at all, which wouldn’t properly remove excess penetrant. The typical recognized removal methods include water-washable, solvent-removable, and post-emulsifiable types; among the options given, water-washable is the proper classification.