True or False: Ratio control is used when it is necessary to continuously mix two or more streams to maintain steady composition.

Ratio control is indeed a method utilized in processes where it is essential to maintain a specific composition by continuously mixing two or more streams. This control strategy automatically adjusts the flow rates of the different components based on a predetermined ratio, ensuring that the final mixture maintains a consistent quality regardless of variations in the flow rates of the individual streams.

In situations like blending materials, chemical reactions, or managing feed rates in a process, ratio control is invaluable. It provides the necessary precision for processes where the ratio of inputs significantly affects the outcome. By maintaining a constant ratio, operators can ensure that the product meets required specifications, thus increasing efficiency and quality in production.

While other types of control strategies may apply in various contexts, none can match the specificity and effectiveness of ratio control in continuously mixing streams to maintain steady composition.