Basic Firefighter Written Exam 2025 – 400 Free Practice Questions to Pass the Exam

The sense that should not be used when detecting hidden fires during overhaul is smell. While the sense of smell can help identify certain fire-related odors, relying on it for detecting hidden fires poses significant risks. Smoke and toxic gases can obscure the ability to accurately assess the situation, and it can also lead to inhalation hazards for firefighters.

In contrast, utilizing sight, hearing, and touch are critical during the overhaul phase. Sight allows firefighters to look for visual signs of fire, such as smoke or heat distortion. Hearing can help detect sounds related to fire activity, such as crackling or popping. Touch is essential for assessing heat levels in structures and materials, helping firefighters determine if there are hot spots or areas that need further investigation. Therefore, while each sense has its role in fire detection, relying on the sense of smell can be misleading and dangerous in a firefighting context.