A professional who tends tanks and related equipment that coats cathode screens with asbestos for use in electrolytic cells. Respnsibilities include:

• Opens valve to fill cathode tank with caustic liquor.
• Weighs out prescribed quantity of asbestos and dumps it into tank.
• Starts air compressor and opens valve to force asbestos and cell liquor to mixing tank and return it to cathode tank after agitation for specified time.
• Draws sample of resulting slurry and determines specific gravity, using hydrometer.
• Positions cathode screen over cathode tank, using crane.
• Connects vacuum hose to cathode and lowers cathode into tank for asbestos coating, using hoist.
• Observes vacuum gauge to determine number of dips or immersion time necessary to apply asbestos coating of specified thickness to cathode.
• Applies asbestos tape to secure cathode rim.
• Transfers coated cathode to drying area, using crane.
• Records number of cathodes coated, immersion and drying time, and quantity of materials used.
• May tin cathode bars, using tinning compound.
• May cut asbestos paper to size and cover screens and plates with new linings.