Contacts (impimpingements) during exposure are associated with which general category?

• A. Spatial Distribution
• B. Time Frames
• C. Concentration
• D. Temperature

Answer: (B)

The key idea here is that exposure risk is governed by how long contact with the hazard lasts. Contacts during exposure are all about duration, i.e., the time frame of exposure. The longer the exposure lasts, the greater the potential dose and risk, assuming other factors are equal.

Spatial distribution would describe where the hazard is and how it’s spread, not how long contact occurs. Concentration tells you how much hazard is present, which influences dose rate but doesn’t define how long the exposure lasts. Temperature affects the behavior of the hazard or bodily response but not the length of time contact occurs.