Ontario Operator-in-Training (OIT) Practice Exam

What is a significant hazard associated with chlorine gas?

1. It is highly flammable

2. It can cause severe respiratory irritation

3. It is safe to handle at all times

4. It only affects the skin

The correct answer is: It can cause severe respiratory irritation

Chlorine gas is recognized as a significant health hazard primarily because it can cause severe respiratory irritation. When inhaled, chlorine can lead to symptoms ranging from coughing and throat irritation to more serious respiratory conditions, such as pulmonary edema, which is a potentially life-threatening condition. The effects of chlorine exposure may vary depending on the concentration and duration of exposure, but the respiratory system is particularly vulnerable, making the inhalation of chlorine gas a major concern. In contrast to the other options, chlorine's flammability is minimal under normal conditions, thus making it less relevant as a primary hazard. Chlorine is not considered safe to handle at all times; it requires specific precautions and proper protective equipment due to its toxicological properties. Furthermore, while skin exposure can lead to irritation and burns, the respiratory hazards represent a more significant threat and are paramount in assessing chlorine's overall risk profile. Understanding these risks is essential for ensuring safety when working with or around chlorine gas.