A professional who assists casting operator in casting aluminum alloys into ingots. Respnsibilities include:

• Places distributing trough between furnace taphole and mold.
• Positions baffle plates, screens, and control pins in trough, using handtools.
• Takes sample of molten metal for subsequent analysis.
• Skims dross off molten aluminum in holding furnace, using drag rake.
• Inserts thermocouple into mold and records temperature of ingot.
• Examines ingot for cracks, using reflectoscope.
• Stencils identification numbers on ingots.
• Hooks cable to ingot for removal by overhead crane operator.
• Performs other duties as described under helper master title.