Final answer:
The rack for potatoes and peanut oil is called a frying rack or a cooking rack.
Step-by-step explanation:
The rack for potatoes and peanut oil is called a frying rack or a cooking rack. It is commonly used in the food industry to fry food items such as potatoes and other ingredients in peanut oil. The rack allows the food to be evenly cooked and prevents it from sticking to the bottom of the frying pan or pot.