Common Safety Orientation (CSO) Practice Test

What is a common respiratory hazard that requires a fit testing for respirators?

1. Asbestos particles

2. Carbon dioxide

3. Dust and airborne particles

4. Ozone levels

The correct answer is: Dust and airborne particles

The presence of dust and airborne particles is a common respiratory hazard that necessitates fit testing for respirators. When workers are exposed to dust and other small airborne particles, it is crucial that the respirators they wear fit properly to ensure a tight seal against the skin. A good fit minimizes the risk of inhaling harmful substances, as any gaps can allow contaminated air to enter the respirator, undermining its protective capabilities. Fit testing is essential because different individuals may have varying facial structures, leading to different fit characteristics. This means that a respirator that works well for one person might not provide adequate protection for another due to improper fit. Through fit testing, employers can confirm that workers are using the right type and size of respirator for their specific needs, ensuring high levels of safety and health in environments where dust and airborne particles are present. Other hazards listed, such as asbestos particles, carbon dioxide, and ozone levels, may also pose significant risks, but the need for fit testing due to airborne particles and dust is particularly relevant, given the broad exposure scenarios in various workplaces. For example, asbestos is typically managed using specific procedures, and carbon dioxide is more of a concern in relation to oxygen levels rather than as a particulate hazard, while ozone is typically