Emergency Medical Technician (EMT) Intermediate Practice Exam

Which of the following is NOT a common hazard associated with a structural fire?

1. Carbon monoxide poisoning

2. Smoke inhalation

3. Flashover

4. Carbon dioxide deficiency

The correct answer is: Carbon dioxide deficiency

In the context of hazards associated with a structural fire, carbon monoxide poisoning, smoke inhalation, and flashover are well-documented and commonly recognized risks for individuals exposed to such environments. Carbon monoxide is a colorless, odorless gas produced during burning that can lead to poisoning, which occurs when inhaled and prevents oxygen from entering the body's tissues. Smoke inhalation refers to the respiratory damage caused by inhaling the toxic products of combustion, which can lead to severe respiratory distress or failure. Flashover is a phenomenon where all combustible materials in a room ignite almost simultaneously, creating a rapid spread of fire and increasing the risk of injury or death for anyone within that space. On the other hand, carbon dioxide deficiency is not typically listed as a common hazard in structural fires. In fact, during a fire, carbon dioxide levels would generally increase due to combustion, and the concern would be more about the toxic levels of gases and the overall reduction of oxygen available to breathe rather than a deficiency of carbon dioxide. Therefore, the correct answer identifies carbon dioxide deficiency as an uncommon hazard associated with structural fires.