Final answer:
When sanitizing utensils using hot water in a three-compartment sink, the temperature of the hot water must be at least 74°C or 165°F to kill bacteria and ensure proper sanitation.
Step-by-step explanation:
When sanitizing utensils using hot water in a three-compartment sink, the temperature of the hot water must be at least 74°C or 165°F. This high temperature is required to kill bacteria and ensure proper sanitation. Using a thermometer to check the water temperature is recommended to ensure that it reaches the necessary level. The heat from hot water helps to break down and remove bacteria effectively from utensils.