Associate Certified Entomologist (ACE) Practice Exam

How many hours is generally considered a good rule of thumb for respirator service life?

1. 20 hours

2. 30 hours

3. 40 hours

4. 50 hours

The correct answer is: 40 hours

The guideline suggesting that around 40 hours is generally considered a good rule of thumb for respirator service life is based on the typical usage and performance of many types of respirators, particularly in environments where they are exposed to contaminants. Using a respirator for up to 40 hours ensures that it is effective in filtering out harmful particles or gases and aligns with recommendations from health and safety organizations. This timeframe is also practical, as it balances the need for protection with the realities of wear and tear on the equipment, which can lead to reduced effectiveness and comfort when used beyond this period. Maintaining a strict adherence to this guideline helps ensure that respirators provide the intended level of protection and helps to avoid potential health risks associated with using a filter or cartridge that has exceeded its effective lifespan.