KTH Food Handler/Manager Practice Exam

The indication that a glass washer is sanitizing properly is the change in color of the test paper due to the presence of the chemical sanitizer. This method is based on using test strips that are designed to react with the sanitizing agent in the water. When the sanitizer is present at the appropriate concentration, the test paper will show a specific color change, signaling effective sanitization.

For a glass washer, achieving the correct concentration of the sanitizing solution is essential for killing harmful pathogens on glassware. This color change provides a quick and reliable visual confirmation that the sanitization process is functioning within the necessary parameters. It's a direct way to ensure that the cleaning process is effective, which is pivotal in maintaining safety and hygiene in food service environments.

In contrast, monitoring the temperature, machine run times, or water levels, while important for operational efficiency, do not directly confirm that the required sanitation level has been achieved. Temperature may indicate a proper hot water rinse but not the efficacy of chemical sanitizers, and purely timing the operation does not guarantee that sanitizing agents are at the correct concentration. Meanwhile, consistent water levels could relate to machine functionality but do not provide a measure of sanitization effectiveness.