Associate Safety Professional Practice Exam

Simple asphyxiants are defined as:

1. Gases that are always toxic

2. Substances that reduce oxygen concentration

3. Chemical compounds that cause severe injury

4. Matter that requires specific storage conditions

The correct answer is: Substances that reduce oxygen concentration

Simple asphyxiants are defined as substances that displace oxygen in the environment or reduce the concentration of oxygen available to breathe. When the oxygen level decreases, it can lead to suffocation or asphyxia in individuals exposed to the substance, as the body relies on oxygen to function properly. Common examples of simple asphyxiants include inert gases such as nitrogen or argon, which are non-toxic but can still lead to impaired oxygen availability in enclosed spaces. In contrast, the focus of the other definitions does not accurately capture what simple asphyxiants are. While some gases may be toxic, simple asphyxiants themselves are not always toxic; they primarily pose a risk by reducing oxygen levels. Additionally, not all substances classified as simple asphyxiants cause severe injury directly, nor do they necessarily require specific storage conditions that differ from other materials. Instead, their primary hazard lies in their ability to displace breathable air, emphasizing the importance of sufficient oxygen levels in environments where such gases are present.