What device is used by responders to monitor their exposure to radiation?

• A. Gas chromatography
• B. Radiation dosimeter
• C. Thermal imaging camera
• D. Combustible gas indicator

Answer: (B)

A radiation dosimeter is the device specifically designed to measure an individual's exposure to ionizing radiation over time. This tool is crucial for ensuring the safety of responders working in environments where radiation may be present. The dosimeter functions by detecting and recording the amount of radiation the wearer is exposed to, allowing them to monitor their limits in real-time.

This is essential for compliance with safety protocols and for protecting the health of first responders, as prolonged exposure to radiation can lead to serious health risks. Understanding and utilizing a radiation dosimeter enables responders to take appropriate precautions and minimize exposure during hazardous situations.

Other devices listed have distinct functions and are not designed for radiation exposure monitoring. Gas chromatography is used for analyzing chemical compositions, a thermal imaging camera detects heat signatures, and a combustible gas indicator senses flammable gases, none of which are related to radiation exposure.