A professional who tends mechanical crusher to crush and screen, for reuse, insulating mixture from electrical furnaces in which carbon is graphitized. Respnsibilities include:

• Breaks mixture to size with pick.
• Shovels mixture into hopper of crusher.
• Starts crusher and conveyor belts that carry crushed and screened mixture to storage bins.
• Marks bins as to types of mixture stored.
• Adjusts and cleans conveyors and screen vibrators.