In the lead dust cleaning sequence, which step comes after vacuum debris?

• A. Wet clean for fine dust
• B. Vacuum again for remaining particles
• C. Dry wipe
• D. Apply sealant

Answer: (B)

The sequence tests how you progressively reduce lead dust by physically removing particles before damp cleaning. After removing visible debris with the vacuum, a second vacuum is used to capture residual particles that the first pass may have left behind. This second pass lowers the overall dust load and minimizes resuspension, making the subsequent cleaning steps more effective and reducing the chance of spreading contamination.

Wet cleaning for fine dust would come after this extra vacuum to tackle the remaining fine particles more thoroughly, rather than as the immediate next move. A dry wipe is less effective for handling fine dust and could spread contamination, and applying a sealant is a finishing step that comes later, not part of the immediate cleaning sequence.