Which of the following is NOT a required function of the three-sink compartment system?

The correct response is that "Drain" is not classified as a required function of the three-sink compartment system. In a three-sink system, there are typically designated processes for washing, rinsing, and sanitizing dishes and kitchen utensils to ensure adequate hygiene and safety in food service operations.

The first sink is dedicated to washing, where items are thoroughly cleaned with soapy water to remove any food residue and contaminants. The second sink serves for rinsing, which removes any soap and debris before the final step. The third sink is crucial for sanitation, where items are soaked in a sanitizing solution or hot water to kill any remaining pathogens, ensuring they are safe for use.

While draining is an important part of the overall process, it is not formally recognized as one of the three primary functions. Instead, draining typically occurs naturally as part of the washing and sanitizing processes. Thus, the emphasis is placed on washing, rinsing, and sanitation, each serving its critical role in maintaining proper hygiene standards in food handling and preparation.