A professional who operates machines to grind cooked wood chips into pulp and blend pulp with other specified ingredients in manufacture of wallboard. Respnsibilities include:

• Turns handwheel to adjust grinding-plate settings.
• Starts machines and adjusts panel controls to maintain level in pulp and water chests and regulate flow of chips through grinding machines.
• Observes charts, dials, and gauges; and adjusts levers, valves, and panel controls to regulate flow of specified amounts of pulp, alum, wax, asphalt, and starch into blending machine.
• May weigh samples of wet and dry pulp on scales and calculate moisture content.
• May test pulp for freeness, fineness, density, and breakage.
• May record production and test data.