CDPH Lead Inspector/Assessor California State Practice Exam

Which deterioration pattern is characterized by reptilian scale shapes in paint?

1. Checking

2. Alligatoring

3. Flaking

4. Cracking

The correct answer is: Alligatoring

The option indicating that alligatoring is the correct answer relates to the distinctive appearance of the paint as it deteriorates. Alligatoring refers to a specific pattern of paint degradation that resembles the scales of an alligator or reptile. This pattern occurs when the top layer of paint forms deep cracks while the underlying layer remains intact, creating a pattern that resembles the irregular scales found on a reptile’s skin. The occurrence of alligatoring is typically associated with aging paints or those that have not properly adhered to the surface beneath them, leading to a loss of adhesion and the subsequent formation of a textured, scale-like pattern. Recognizing alligatoring is crucial for lead inspectors and assessors, as it can indicate underlying issues with the paint system that may require remediation or replacement. In contrast, the other forms of paint deterioration have distinct characteristics that do not align with the reptilian scale shape. Checking involves surface cracks in a more linear pattern, while flaking refers to pieces of paint breaking away from the surface completely. Cracking, while it may appear similar, does not typically form the scale pattern associated with alligatoring. This clarity helps in understanding the unique identifiers associated with each type of paint deterioration.