What term defines the limit of exposure duration to prevent injury?

• A. Exposure limit
• B. Permissible exposure limit
• C. Ceiling limit
• D. Air limit

Answer: (A)

Exposure limit is the general term that defines the boundary beyond which exposure is considered unsafe. It sets the maximum level of exposure a person should experience, including how long exposure can last, to prevent injury. In practice, safety standards use exposure limits to protect workers by bounding both intensity and duration of exposure. A ceiling limit is an instantaneous cap that should never be exceeded at any moment, while a permissible exposure limit is a specific regulatory limit for exposure over a defined time period (like an 8-hour shift). The term air limit isn’t a standard use in this context. So, the broad concept of an exposure limit best fits the idea of a limit on exposure duration to prevent injury.