# Chemical Plant and System Operators > Control or operate entire chemical processes or system of machines. - Code: 51-8091.00 (O*NET-SOC; SOC 2018 51-8091) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 19 tasks (14 core and 5 supplemental) - Page: https://foundation.org.ai/occupations/51-8091.00 - JSON: https://foundation.org.ai/data/tasks/51-8091.00.json ## What the work is made of 1. Monitor recording instruments, flowmeters, panel lights, or other indicators and listen for warning signals to verify conformity of process conditions. Core task · Task 10494 · Rated by 102 people who do the job, July 2015 2. Regulate or shut down equipment during emergency situations, as directed by supervisory personnel. Core task · Task 10499 · Rated by 102 people who do the job, July 2015 3. Control or operate chemical processes or systems of machines, using panelboards, control boards, or semi-automatic equipment. Core task · Task 10495 · Rated by 102 people who do the job, July 2015 4. Move control settings to make necessary adjustments on equipment units affecting speeds of chemical reactions, quality, or yields. Core task · Task 10493 · Rated by 102 people who do the job, July 2015 5. Inspect operating units, such as towers, soap-spray storage tanks, scrubbers, collectors, or driers to ensure that all are functioning and to maintain maximum efficiency. Core task · Task 10504 · Rated by 103 people who do the job, July 2015 6. Draw samples of products and conduct quality control tests to monitor processing and to ensure that standards are met. Core task · Task 10498 · Rated by 103 people who do the job, July 2015 7. Record operating data, such as process conditions, test results, or instrument readings. Core task · Task 10496 · Rated by 102 people who do the job, July 2015 8. Patrol work areas to ensure that solutions in tanks or troughs are not in danger of overflowing. Core task · Task 10502 · Rated by 103 people who do the job, July 2015 9. Turn valves to regulate flow of products or byproducts through agitator tanks, storage drums, or neutralizer tanks. Core task · Task 10506 · Rated by 103 people who do the job, July 2015 10. Interpret chemical reactions visible through sight glasses or on television monitors and review laboratory test reports for process adjustments. Core task · Task 10501 · Rated by 100 people who do the job, July 2015 11. Confer with technical and supervisory personnel to report or resolve conditions affecting safety, efficiency, or product quality. Core task · Task 10497 · Rated by 102 people who do the job, July 2015 12. Start pumps to wash and rinse reactor vessels, to exhaust gases or vapors, to regulate the flow of oil, steam, air, or perfume to towers, or to add products to converter or blending vessels. Core task · Task 10500 · Rated by 99 people who do the job, July 2015 13. Notify maintenance, stationary engineering, or other auxiliary personnel to correct equipment malfunctions or to adjust power, steam, water, or air supplies. Core task · Task 10503 · Rated by 101 people who do the job, July 2015 14. Repair or replace damaged equipment. Core task · Task 10509 · Rated by 102 people who do the job, July 2015 15. Gauge tank levels, using calibrated rods. Supplemental task · Task 10508 · Rated by 101 people who do the job, July 2015 16. Calculate material requirements or yields according to formulas. Supplemental task · Task 10507 · Rated by 99 people who do the job, July 2015 17. Direct workers engaged in operating machinery that regulates the flow of materials and products. Supplemental task · Task 10505 · Rated by 102 people who do the job, July 2015 18. Supervise the cleaning of towers, strainers, or spray tips. Supplemental task · Task 10511 · Rated by 101 people who do the job, July 2015 19. Defrost frozen valves, using steam hoses. 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