1. Controls cupola furnace to melt and refine iron, scrap metal, and other additives to produce gray iron castings: Closes and props door in bottom of cupola. 2. Shovels sand into cupola and tamps sand to form wedge-shaped layer on cupola bottom sloping toward taphole. 3. Kindles fire, using gas …
1. Draws molten metal from cupola into ladles for pouring into molds to make castings: Signals OVERHEAD CRANE OPERATOR or POURER, METAL to place ladle under cupola spout. 2. Withdraws bott from taphole, using long iron rod, and allows molten metal to flow into ladle. 3. Inserts new plug on …
1. Repairs and rebuilds lining of cupola: Mixes sand, clay, and other refractory materials and applies mixture, using trowels and other handtools, to burned areas in brick lining of cupola. 2. Tears out badly burned brick linings and relines cupola with new firebrick, using bricklayer’s tools. 3. Closes and props …
1. Operates water-cooled cupola furnace and related equipment to melt coke, slag, basalt, lime, and silica into molten mineral, and spins molten mineral into mineral wool fibers: Lights fire in furnace to melt charge. 2. Reads gauges and turns valves to regulate water and steam pressure. 3. Observes melting of …
1. Operates skip hoist, using levers and foot brakes, to lift pig iron, coke, and limestone to top of cupola furnace for CUPOLA CHARGER. 2. Maintains and lubricates hoisting machinery.
1. Charges cupola furnace with slag, basalt, lime, and silica to produce mineral wool: Weighs and measures portions of coke, slag, basalt, lime, and silica according to formula specified in orders from CUPOLA OPERATOR, INSULATION. 2. Charges materials into furnace in alternate layers. 3. May use tractor equipped with scoop …
1. Charges scrap iron or pig iron, coke, and limestone into cupola in which iron is melted to make castings: Determines quantities and types of materials to be charged, following work orders or verbal instructions from CUPOLA TENDER. 2. Shovels materials into wheelbarrow. 3. Weighs net contents and wheels materials …
1. Assembles metal cabinets: Inserts pins in hinges to attach doors to cabinet. 2. Attaches stationary knobs in place with screws. 3. Fits, assembles, and attaches locks to doors. 4. Measures and drills support holes in shelves and shelf brackets and screws shelves in place. 5. Adjusts doors, knobs, and …
1. Operates lockstitch sewing machine to set brassiere cups to foundation garment or swim suit. 2. Aligns cup with lining or body of garment, following markings, and joins parts, manipulating fabric to conform to shape of cup. 3. Performs other duties as described under SEWING-MACHINE OPERATOR, REGULAR EQUIPMENT Master Title.
1. Casts and molds cultured marble products, such as sink basins and wall panels: Calculates amount of material, such as ground marble, resin, and catalyst, needed to make products, utilizing specifications on work order. 2. Weighs materials, using scales, and pours materials into mixing machine. 3. Pours specified amount of …
1. Tends crushing machine that crushes and washes cullet for use in manufacturing glass: Starts conveyor that transfers cullet from storage to crushing machine. 2. Starts machine and observes its operation to determine whether cullet is ground to specified fineness. 3. Starts water spray to wash crushed cullet. 4. Inspects …
1. Examines barrel staves after jointing: Examines bilge of stave and rejects those not conforming to specification. 2. Examines and rejects staves containing defects, such as knots, wormholes, and checks. 3. Ties accepted staves into bundles, or arranges and fits staves by width between stops of matching rack until total …
1. Folds cuffs preparatory to sewing cuffs to sleeves of knitted garments: Lays flat cuff on table and folds cuff in half or pulls tubular cuff over cone-shaped form and turns cuff half-way back, matching edges. 2. Stacks folded cuffs.
1. Tends battery of machines that cut and fold knit tubing for use as cuffs on gloves: Pushes box of knit tubing from storage to machine, using handtruck. 2. Turns screws on cams that control speed and motion of cutting blade and feeding mechanism to cut tubing to specified length, …
1. Integrates prerecorded theme, background, and bridge music with story line and film sequence to arrange musical score for episode of television series, using knowledge of film scoring: Reads script of episode to become familiar with story line. 2. Confers with DIRECTOR, TELEVISION to coordinate interpretation of script, including mood …
1. Tends machine that stacks and binds cured concrete blocks into packages of specified dimensions for shipping: Places strapping tape on machine feed spindles and threads tape through guides and rollers of machine. 2. Presses buttons to activate conveyor that positions blocks under binding mechanism of machine, and flips switch …
1. Conducts studies of nonmetallic minerals used in horological industry. 2. Performs experimental research concerned with projects, such as development of diamond tools and dies, fabrication of jeweled bearings, and development of grinding laps III and wheels. 3. Tests industrial diamonds and abrasives to determine grain size, pattern, crystalline orientation, …
1. Tends crystallizer to process chemical solution into crystalline form: Pumps specified amounts of materials and solvent or dumps drums of solutions into crystallizer. 2. Starts agitator and pumps coolants into coils of crystallizer. 3. Reads thermometer, observes product, and turns coolant valve to regulate temperature and control rate of …
1. Tends cooling tank and crystallizer that starts crystallization of liquid sugar: Turns valves and starts pumps to fill cooling tank with liquid sugar and regulate flow of cold water through cooling coils until specified temperature is attained. 2. Turns wing nut to release tension on outlet door of crystallizer …
1. Operates precision saws to slice wafers from semiconductor crystal ingots, such as silicon or gallium arsenide: Attaches mounted crystal to holding fixture of automatic feed on saw, using clamps. 2. Adjusts saw controls to set speed and angle of saw blade, thickness of cut, and angle of holding fixture. …
1. Mounts crystal ingot onto mounting block of crystal saw preparatory to slicing semiconductor wafers from ingot: Sorts semiconductor crystal ingots according to size and crystal orientation. 2. Mixes resin and hardening agent to form epoxy adhesive and spreads adhesive on graphite backing, using putty knife. 3. Attaches crystal ingot(s. …
1. Leads workers engaged in grinding, sawing, flatting, and inspecting crystal ingots used in semiconductor wafer manufacturing under direction of SUPERVISOR, ELECTRONICS PROCESSING : Discusses production objectives, work priorities, and workflow progress with SUPERVISOR, ELECTRONICS PROCESSING. 2. Reviews daily production logs, inventories ingots in each production stage, and assigns tasks …
1. Analyzes processing procedures and equipment functions to identify and resolve problems in growing semiconductor crystals, utilizing knowledge of crystal growing, and trains other workers to grow crystals: Observes furnace operation and crystal growth and reads logbook entries to identify deviations from specifications and procedures, and advises CRYSTAL GROWER on …
1. Sets up and operates furnaces to grow semiconductor crystals from materials, such as silicon, quartz, or gallium arsenide: Loads furnace with seed crystal, dopant, and crystal growing materials, such as polysilicon, quartz, gallium arsenide, or remelt. 2. Reads work order and adjusts furnace controls to regulate operating conditions, such …
1. Operates grinding machine to abrade semiconductor crystal ingot to improve cylindrical shape of ingot and attain specified diameter: Reads work order to determine target diameter of ingot. 2. Measures ingot diameter, using calipers or micrometer, and calculates thickness of material to be removed from ingot and length of grinding …
