Which device should be used to detect hidden fires if available?

• A. TIC/FLIR
• B. Infrared Thermometer
• C. Smoke Detector
• D. Multigas Detector

Answer: (A)

The main idea here is using heat vision to find concealed fires. A thermal imaging camera (TIC/FLIR) detects infrared radiation and creates an image based on surface temperatures. This lets you see hot spots behind walls, in ceilings, or inside compartments, even when smoke blocks your view. That ability to visualize heat through obstructed areas makes it the best tool for locating hidden fires when it’s available.

Infrared thermometers measure temperature at a single spot, so they can’t sweep an area for hidden heat sources. Smoke detectors respond to smoke in the air, not to concealed flames. Multigas detectors monitor gas levels and oxygen but don’t reveal fire locations behind barriers.