Set up, operate, or tend machines to crush, grind, or polish materials, such as coal, glass, grain, stone, food, or rubber.

Inspect chains, belts, and scrolls for signs of wear. Mark bins as to types of mixtures stored. Notify supervisors of needed repairs. Test samples of materials or products to ensure compliance with specifications, using test equipment. Transfer materials, supplies, and products between work areas, using moving equipment and hand tools. Add or mix chemicals and ingredients for processing, using hand tools or other devices. Break mixtures to size, using picks. Dislodge and clear jammed materials or other items from machinery and equipment, using hand tools. Load materials into machinery and equipment, using hand tools. Move controls to start, stop, or adjust machinery and equipment that crushes, grinds, polishes, or blends materials. Observe operation of equipment to ensure continuity of flow, safety, and efficient operation, and to detect malfunctions. Read work orders to determine production specifications and information. Record data from operations, testing, and production on specified forms. Reject defective products and readjust equipment to eliminate problems. Set mill gauges to specified fineness of grind. Tend accessory equipment such as pumps and conveyors in order to move materials or ingredients through production processes. Turn valves to regulate the moisture contents of materials. Weigh or measure materials, ingredients, and/or products at specified intervals to ensure conformance to requirements. Clean work areas. Clean, adjust and maintain equipment, using hand tools. Collect samples of materials or products for laboratory testing. Examine materials, ingredients, or products visually or with hands, in order to ensure conformance to established standards.

Production and Processing -- Knowledge of raw materials, production processes, quality control, costs, and other techniques for maximizing the effective manufacture and distribution of goods. Mechanical -- Knowledge of machines and tools, including their designs, uses, repair, and maintenance. Mathematics -- Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.

Operation and Control -- Controlling operations of equipment or systems. Operation Monitoring -- Watching gauges, dials, or other indicators to make sure a machine is working properly. Quality Control Analysis -- Conducting tests and inspections of products, services, or processes to evaluate quality or performance.

Control Precision -- The ability to quickly and repeatedly adjust the controls of a machine or a vehicle to exact positions. 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. Written Expression -- The ability to communicate information and ideas in writing so others will understand. Static Strength -- The ability to exert maximum muscle force to lift, push, pull, or carry objects. 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). Written Comprehension -- The ability to read and understand information and ideas presented in writing. Manual Dexterity -- The ability to quickly move your hand, your hand together with your arm, or your two hands to grasp, manipulate, or assemble objects.

Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles). 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. Inspecting Equipment, Structures, or Material -- Inspecting equipment, structures, or materials to identify the cause of errors or other problems or defects. Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. 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. Performing General Physical Activities -- Performing physical activities that require considerable use of your arms and legs and moving your whole body, such as climbing, lifting, balancing, walking, stooping, and handling of materials. Documenting/Recording Information -- Entering, transcribing, recording, storing, or maintaining information in written or electronic/magnetic form.