CDPH Lead Inspector/Assessor California State Practice Exam

Which of the following represents a type of "bulk deterioration" in painted surfaces?

1. Peeling

2. Blistering

3. Alligatoring

4. Fading

The correct answer is: Alligatoring

Alligatoring is considered a type of "bulk deterioration" in painted surfaces because it involves the formation of a pattern that resembles the skin of an alligator, often resulting from age, moisture, or inadequate surface preparation prior to painting. This type of deterioration signifies more extensive failures in the integrity of the paint layer, leading to large areas where the paint is no longer adhered properly to the underlying surface. In contrast, peeling and blistering are more focused manifestations. Peeling typically indicates adhesion loss in specific areas, where the paint separates from the substrate, while blistering occurs when moisture or air gets trapped beneath the paint film, causing bulges. Fading refers to a loss of color and is primarily cosmetic rather than structural, indicating degradation of the pigments without a significant loss of the paint film's adherence or integrity. Thus, alligatoring stands out as a clear example of bulk deterioration within the context of painted surfaces, as it reflects widespread and more severe damage to the paint.