- Settore: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who controls equipment to increase strength of nitric acid, used in making TNT and nitroglycerin. Respnsibilities include:
* Regulates flow of sulfuric acid and weak nitric acid into mixing tank and controls flow of steam, water, air, and mixed acids through dehydrating tower, absorption tower, bleaching tower, still, and condenser to produce concentrated nitric acid meeting plant standard.
* Monitors thermometers and pressure gauges and adjusts valves to maintain specified temperature and pressure in each unit.
* Takes samples of product for laboratory analysis or tests acid strength, using pH meter.
* Records instrument readings in shift log.
Industry:Professional careers
A professional who operates or controls stills, compressors, reactors, and related chemical process equipment during rest periods, lunch hour, or emergency, performing duties of regular operators as directed by operators or supervisory personnel.
* When not relieving equipment operator, performs tasks such as assisting operator in turning valves to control flow of materials, setting equipment controls at specified readings, gauging tank levels, and recharging equipment with fresh catalytic agents.
* May be designated according to equipment operated or worker relieved as benzene-still utility operator; butadiene-converter utility operator; dehydrogenation-converter utility operator; ethylbenzene-compressor utility operator; styrene-continuous-still utility operator.
Industry:Professional careers
A professional who operates screen machine that folds and bonds edges of vinyl sheets to reinforcing strips and punches holes in strips to form shower curtains. Respnsibilities include:
* Selects roll of vinyl specified on work order, inserts metal cylinder in roll, positions roll in holding brackets of machine, and turns knobs to secure cylinder.
* Fills cylinder with air to prevent slippage of roll during machine operation, using airhose.
* Cuts lead end of vinyl with scissors to straighten end and attaches end to material in machine, using tape.
* Adjusts guides that fold edges of vinyl and solvent release mechanism that seals folded edges, using handtools.
* Turns knobs to set heat level of rollers that press and seal folded edges of vinyl.
* Inserts roll of vinyl reinforcing strip in holder above press of machine, and pushes end of strip onto chain that automatically positions strip for bonding to and reinforcing lead end of vinyl sheet.
* Pushes button to start machine and measures vinyl in machine to verify width specified on work order, using tape measure.
* Flips switches to activate feed chains that automatically pull vinyl and reinforcing strip into position under press, and to lower press that cuts, punches holes in, and presses and bonds strips against vinyl to form shower curtains.
* Observes movement of vinyl through machine and adjusts machine periodically to eliminate detected defects.
Industry:Professional careers
A professional who fills spinnerette packs (metal cups) with measured amount of treated sand to filter impurities from molten nylon before extrusion into filaments. Respnsibilities include:
* Examines holes in bottom of pack, using microscope, to detect damaged or clogged openings.
* Weighs out prescribed amounts and grades of treated sand and pours sand into pack, leveling sand with crescent-shaped tool.
* Repeats filling and leveling process until specified number of layers have been built up, according to type of nylon to be spun.
* Disassembles used packs, pours out sand, and washes pack in soapy water to remove burned sand adhering to cup after extrusion of molten nylon.
Industry:Professional careers
A professional who forms rubber wax injection molds by vulcanizing pieces of rubber around metal sample. Respnsibilities include:
* Places metal sample into frame and packs raw rubber around sample.
* Clamps sample, frame, and rubber into vulcanizing machine.
* Turns on machine, waits specified time, and removes mold from machine.
* Splits mold into two pieces to remove metal sample, using knife or scalpel.
* Inspects mold for defects.
* May form investment molds around wax patterns.
* May operate centrifugal casting machine.
* May burn grooves or crevices in mold to correct defects, using soldering gun.
Industry:Professional careers
A professional who cleans storage tanks and glass-lined, high-pressure reaction vessels used in production of copolymer synthetic rubber. Respnsibilities include:
* Turns vacuum system valves to remove vapors from vessels, and locks electrically driven agitator in position.
* Steams and ventilates vessels, using steam and airhoses.
* Removes solidified resin from vessel and cleans inner surfaces and equipment, using sparkproof safety tools, cleaning compounds, and waterhose.
* May test fumes with explosion meter to determine presence of explosive mixture of gases.
Industry:Professional careers
A professional who cleans tanks, vats, kettles, and chutes, used in production of paint products. Respnsibilities include:
* Disconnects pipelines and locks safety devices on agitator switch.
* Enters tanks and examines condition of interior to determine cleaning method.
* Connects air-compressor hoses to portable pneumatic chisel and forced-air ventilating equipment.
* Starts portable electric pump to draw residual liquid from tank.
* Chips and scrapes caked material from walls, ceiling, agitator, and floor surfaces, using pneumatic chisel or hand scrapers.
* Shovels scrapings into container and removes container from tank, using hoist.
* Dumps scrapings into disposal drum and carts drum to refuse area.
* Scrubs tank surfaces, using brush, water, and solvent.
* May presoak tank with caustic solution.
* May haul kettles and chutes to burning area and burn off inflammable residue in vessels.
Industry:Professional careers
A professional who performs any combination of following and related tasks in molding department of plastics fabricating establishment. Respnsibilities include:
* Examines plastic products for defects, such as scratches, flash, and discoloration, and discards defective items into reject box.
* Packs finished products into cartons and affixes content labels.
* Conveys supplies from storage to work stations, using handtruck.
* Opens collapsed cartons, folds and seals carton bottoms, using moistened gummed tape, and inserts nesting into cartons.
* Unloads plastic mixture from machine hoppers into barrels upon completion of job order, affixes identification labels on barrels, and conveys barrels to mixing department.
* Dumps cleaning solution into hopper and actuates molding machine to purge internal sections of unused plastic mixture.
* Dismantles hopper and drying unit of machine, using handtools, and cleans internal sections, using rags, cleaning solution, and airhose.
* Sweeps and mops production floor.
Industry:Professional careers
A professional who mixes and blends finishing grease and coloring powders used in manufacture of felt hats. Respnsibilities include:
* Pours specified amounts of ingredients, such as oil and lanolin into blending pot, following formulas and using measuring containers.
* Places pot on heated range and stirs ingredients to blend mixture, using paddle.
* Places rolls of greasing or pouncing (smoothing) cloth in processing pan and pours mixture over rolls.
* Turns knobs to activate oven and places processing pans in oven to heat rolls of cloth in mixture for specified period.
* Removes pans from oven at end of processing, affixes batch labels to rolls, and carries rolls to specified storage area.
* Refines dye powders, using powder-refining tumbler machine, and weighs and blends refined powders according to formulas and work order specifications, using scale and automatic mixing machine.
* Labels and stores blended powders, according to color, in specified storage areas.
Industry:Professional careers
A professional who performs any combination of following duties in production of vaccines or toxoids. Respnsibilities include:
* Adds chemical solutions, disease virus, or bacteria to and removes culture fluids from glass vessels, using pump.
* Connects pumping equipment to storage, filtration, fermentation, and refrigeration containers to transfer and refrigerate chemical ingredients or to flush containers.
* Conveys chemical ingredients, disease bacteria, and disease viruses in drums, containers, jars, or vials to and from storage or refrigeration rooms, using handtruck.
* Carries samples of chemical broth, vaccine, or toxoid to quality control unit.
* Tends sterilizers, oven, and autoclave that sterilize glassware, instruments, and portable equipment.
* Washes designated equipment by hand, using brushes, rags, and detergent.
* Thaws frozen ingredients used in developing vaccines or toxoids, using thawing equipment.
Industry:Professional careers
