Indirect CBRN monitoring occurs under which condition?

• A. At the hazard source
• B. With the device at the hazard source
• C. Away from the hazard source
• D. During direct monitoring

Answer: (C)

Indirect CBRN monitoring means gathering information about the hazard from a safe distance, using instruments positioned away from the source to infer conditions without entering the dangerous area. This keeps personnel out of the plume or contaminated zones while still providing critical data. Because it involves measuring conditions from afar, the situation described as being away from the hazard source is the best fit. Placing the device at the source or performing monitoring directly in the hazardous area would be direct monitoring, not indirect. Likewise, monitoring “during direct monitoring” implies active, close-range assessment rather than a distance-based approach.