A professional who assists heat treater i or heat treater ii in annealing, hardening, or tempering metal objects by performing any combination of the following duties. Respnsibilities include:

• Cleans foreign matter, such as scale, rust, or grease, from metal objects, using solvents, wire brushes, scrapers, or hammer and chisel.
• Hangs parts on racks, hooks, or fixture, or places them on handtrucks or conveyors, and charges them into furnace manually or using hoist.
• Adjusts controls to maintain specified temperature in furnace.
• Immerses objects in chemical bath or places objects in containers and packs carbonaceous material around them.
• Quenches heated objects in liquid, such as oil or water.
• Marks identification on parts.
• Performs other duties as described under helper master title.