Environmental Protection Agency (EPA) Model Lead Based Paint Risk Assessor Practice Test

How is the performance substrate correction conducted?

1. By applying heat

2. By abrasion or friction

3. Using chemical cleaners

4. By pressure washing

The correct answer is: By abrasion or friction

The performance substrate correction is effectively conducted through abrasion or friction. This method involves physically removing or altering the surface of the material to achieve a more conducive substrate for subsequent treatments or finishes. Abrasion techniques can help eliminate surface contaminants, roughen smooth surfaces, and expose sound material underneath deteriorated layers. This creates a better adhesion environment for paints, primers, or sealants, which is vital when dealing with surfaces that may have lead-based paint or other hazardous substances. While applying heat, using chemical cleaners, or pressure washing can contribute to surface preparation in various contexts, they do not specifically address the need for correcting the physical surface characteristics of the substrate like abrasion or friction does. Therefore, focusing on the mechanical action of abrasion directly relates to the substrate's performance correction in the context of lead paint management and remediation.