Which of the following statements about PPE is true?

Fit testing is an essential process for ensuring that respirators provide an adequate seal and proper protection for the user. Respirators must fit correctly to be effective in filtering out hazardous airborne particles. The fit testing process helps to identify the right size and type of respirator for an individual, ensuring optimal performance. This requirement is mandated by safety regulations to protect workers from exposure to harmful substances in the air, making fit testing a critical component of respiratory protection programs.

The other options present misconceptions about PPE. For example, PPE is not optional for most workplace environments, as it is a key safety requirement in many settings to protect employees from injuries and health risks. Additionally, PPE is used across various industries, not limited to high-risk jobs; low-risk environments may still require specific types of PPE. Lastly, not all types of PPE are interchangeable. Each type of PPE is designed for specific hazards and protective needs, making it crucial to choose the appropriate equipment for the task at hand.