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    Analyze specifications and control continuous operation of petroleum refining and processing units. Operate control panel to regulate temperature, pressure, rate of flow, and tank level in petroleum refining unit, according to process schedules.

    Reads and analyzes specifications, schedules, logs, and test results to determine changes to equipment controls required to produce specified product. Observes instruments, gauges, and meters to verify conformance to specified quality and quantity of product. Inspects equipment and listens for automated warning signals to determine location and nature of malfunction, such as leaks and breakage. Repairs, lubricates, and maintains equipment or reports malfunctioning equipment to supervisor to schedule needed repairs. Compiles and records operating data, instrument readings, documents, and results of laboratory analyses. Cleans interior of processing units by circulating chemicals and solvents within unit. Samples and tests liquids and gases for chemical characteristics and color of products, or sends products to laboratory for analysis. Operates auxiliary equipment and controls multiple processing units during distilling or treating operations. Monitors and adjusts unit controls to ensure safe and efficient operating conditions. Operates control panel to coordinate and regulate process variables and to direct product flow rate, according to prescribed schedules.

    Mechanical -- Knowledge of machines and tools, including their designs, uses, repair, and maintenance. Chemistry -- Knowledge of the chemical composition, structure, and properties of substances and of the chemical processes and transformations that they undergo. This includes uses of chemicals and their interactions, danger signs, production techniques, and disposal methods. Mathematics -- Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.

    Operation Monitoring -- Watching gauges, dials, or other indicators to make sure a machine is working properly. Operation and Control -- Controlling operations of equipment or systems. Reading Comprehension -- Understanding written sentences and paragraphs in work related documents. Quality Control Analysis -- Conducting tests and inspections of products, services, or processes to evaluate quality or performance. Troubleshooting -- Determining causes of operating errors and deciding what to do about it. Equipment Maintenance -- Performing routine maintenance on equipment and determining when and what kind of maintenance is needed. Repairing -- Repairing machines or systems using the needed tools. Science -- Using scientific rules and methods to solve problems .

    Problem Sensitivity -- The ability to tell when something is wrong or is likely to go wrong. It does not involve solving the problem, only recognizing there is a problem. Number Facility -- The ability to add, subtract, multiply, or divide quickly and correctly. Written Comprehension -- The ability to read and understand information and ideas presented in writing. Near Vision -- The ability to see details at close range (within a few feet of the observer). Information Ordering -- The ability to arrange things or actions in a certain order or pattern according to a specific rule or set of rules (e.g., patterns of numbers, letters, words, pictures, mathematical operations). Auditory Attention -- The ability to focus on a single source of sound in the presence of other distracting sounds. Rate Control -- The ability to time your movements or the movement of a piece of equipment in anticipation of changes in the speed and/or direction of a moving object or scene. Mathematical Reasoning -- The ability to choose the right mathematical methods or formulas to solve a problem. Category Flexibility -- The ability to generate or use different sets of rules for combining or grouping things in different ways.

    Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles). Inspecting Equipment, Structures, or Material -- Inspecting equipment, structures, or materials to identify the cause of errors or other problems or defects. Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources. Repairing and Maintaining Mechanical Equipment -- Servicing, repairing, adjusting, and testing machines, devices, moving parts, and equipment that operate primarily on the basis of mechanical (not electronic) principles. Analyzing Data or Information -- Identifying the underlying principles, reasons, or facts of information by breaking down information or data into separate parts. Processing Information -- Compiling, coding, categorizing, calculating, tabulating, auditing, or verifying information or data. Documenting/Recording Information -- Entering, transcribing, recording, storing, or maintaining information in written or electronic/magnetic form. Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Evaluating Information to Determine Compliance with Standards -- Using relevant information and individual judgment to determine whether events or processes comply with laws, regulations, or standards.