Penetration is the:

• A. Time for the chemical to move through the protective suit
• B. Physical damage from a chemical
• C. Movement of material through closures
• D. Molecular level occurrence

Answer: (C)

Penetration is the movement of a chemical through openings or closures in a barrier. It means the substance crosses seams, gaps, or imperfect closures where the barrier isn’t fully continuous, rather than diffusing through the barrier material itself. That’s why the accurate description is the movement of material through closures.

If you’re thinking in terms of how a chemical moves through the fabric itself, that’s permeation, which is a different process occurring at the molecular level. The idea of physical damage isn’t about crossing the barrier, and focusing on time to pass through would relate more to permeation or breakthrough, not penetration.