Illinois Food Service License Practice Test

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What is required for measuring the sanitizer rinse temperature in a high-temperature dishwashing machine?

Thermocouple thermometer
Glass thermometer
Infrared thermometer
Maximum registering thermometer

The correct answer is: Maximum registering thermometer

The correct choice for measuring the sanitizer rinse temperature in a high-temperature dishwashing machine is a maximum registering thermometer. This type of thermometer is specifically designed to accurately capture and display the highest temperature reached during a wash cycle. It is essential in ensuring that the temperature is sufficient for the sanitization process, which is critical in food service environments for preventing foodborne illnesses. A maximum registering thermometer provides a reliable indicator of whether the sanitizer rinse has reached the necessary temperature to effectively kill harmful microorganisms. In contrast, other types of thermometers, such as thermocouple thermometers or infrared thermometers, may not provide the same level of reliability for this specific use, as they are not designed to retain and display maximum temperatures over a period of time.