ServSafe Manager Practice Exam

Which factors influence the effectiveness of a chemical sanitizer?

1. Temperature, humidity, contact time, and supplier

2. Concentration, temperature, contact time, and pH

3. Type of food, surface texture, and exposure time

4. Water quality, sanitizer brand, and storage conditions

The correct answer is: Concentration, temperature, contact time, and pH

The effectiveness of a chemical sanitizer is primarily influenced by concentration, temperature, contact time, and pH. Concentration refers to the strength of the sanitizer solution; if it is too diluted or too concentrated, it may not effectively kill pathogens. Temperature plays a critical role because certain sanitizers are more effective at higher temperatures, while others may require cooler conditions. Contact time, or the duration the surface remains wet with the sanitizer, is essential to allow enough time for the sanitizer to effectively kill germs. Lastly, pH can impact the efficacy of a sanitizer, as some sanitizers work best at specific pH levels; for example, chlorine sanitizers tend to be more effective at a lower pH, while quaternary ammonium compounds (quats) work better at a neutral pH. Other options consider factors that may have an impact, but they do not encompass the primary scientific principles governing sanitizer effectiveness as well as the mentioned factors do. Understanding these key elements is essential for ensuring effective sanitation in food safety practices.