AZ ROC CR-34 Painting & Wall Covering Practice Questions - Arizona ROC CR-34 Painting And Wall Covering (Residential Commercial) Examination Exam

Access More Questions

What causes efflorescence on exterior stucco or masonry walls, and what is the proper initial cleaning procedure before painting?

Moisture dissolving water-soluble salts within the masonry and carrying them to the surface; remove by dry wire brushing or mild acid washing followed by a clean water rinse. Oil bleeding from wood studs; remove by scrubbing with mineral spirits. UV breakdown of latex resin; remove by pressure washing at 5,000 psi without detergent. Saponification of alkyd primers; remove by applying high-pH lye solution.

Correct Answer:

Moisture dissolving water-soluble salts within the masonry and carrying them to the surface; remove by dry wire brushing or mild acid washing followed by a clean water rinse.

Access more questions from this quiz

Continue to AZ ROC CR-34 Painting & Wall Covering Practice Questions - Arizona ROC CR-34 Painting and Wall Covering (Residential Commercial) Examination Exam for more practice questions and the full quiz experience.

Access More Questions