Petroleum and natural gas refining plant operators operate and monitor plants and adjust and maintain processing units and equipment which refine, distil and treat petroleum, petroleum-based products and by- products, or natural gas.
(a)     Tasks include -
operating electronic or computerized control panel from a central control room to monitor and optimize physical and chemical processes for several processing units;
adjusting equipment, valves, pumps, controls and process equipment;
controlling process start-up and shut-down, troubleshooting and monitoring outside process equipment;
verifying equipment for malfunctions, testing well pipes for leaks and fractures and arranging for maintenance;
analyzing sample products, performing tests, recording data and writing production logs.