||. Wash and rinse reactors. . Charge Batches . Regulate flow of steam, air, or oil. . Operate equipment to adjust rate of chemical reactions or yields. . Control boards, and semi-automatic equipment. . Monitor plant to ensure efficient production. . Regulate and shut down equipment if necessary. . Use steam to defrost frozen valves. . Calculate material requirements and collect appropriate materials. . Keep track of instrument readings. . Adjust power, steam, water, and air supplies.