- Domeniu: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who tends tanks in which liquid and solid chemicals are bleached. Respnsibilities include:
* Pumps specified amounts of liquid materials into tank.
* Dumps or scoops preweighed solids into feed hopper and starts agitator to mix ingredients for prescribed time.
* Observes temperature recorder and turns steam valves to maintain mixture at specified temperature.
* May drain sample of product for laboratory analysis.
* May pump product to storage tanks or to other equipment for further processing.
* May record weight of material used and bleaching time.
Industry:Professional careers
A professional who tends electrolytic cells to produce chlorine, caustic soda, and hydrogen, performing any combination of following tasks under direction of cell tender. Respnsibilities include:
* Pulls and positions current jumpers, connects jumper arms on circuits, and throws switches to cut cells out of service.
* Disconnects brine, gas, and hydrogen lines, using wrenches, to prepare cells for changing; and assists cell changer in positioning cathodes and cell assemblies in place.
* Reconnects lines and flips switches to return cells to operation.
* Opens valves to flush lines, adjust and maintain brine flows and levels, and switch flow from brine tanks to bypasses.
* Draws sample of cell liquor and tests sample for caustic strength, using standard test equipment and chart.
* Cleans brine lines, using brushes and steam hose; and removes and dips sight glasses, nipples, bushings, elbows, tube assemblies, and rubber tubing in acid, solvent, or water bath to clean them.
* Examines chlorine lines for cracks, and cleans out orifices and vents.
* Changes chart recorders.
Industry:Professional careers
A professional who tends electrolytic cells to produce chlorine, caustic soda, and hydrogen, performing any combination of following tasks under direction of cell tender. Respnsibilities include:
* Pulls and positions current jumpers, connects jumper arms on circuits, and throws switches to cut cells out of service.
* Disconnects brine, gas, and hydrogen lines, using wrenches, to prepare cells for changing; and assists cell changer in positioning cathodes and cell assemblies in place.
* Reconnects lines and flips switches to return cells to operation.
* Opens valves to flush lines, adjust and maintain brine flows and levels, and switch flow from brine tanks to bypasses.
* Draws sample of cell liquor and tests sample for caustic strength, using standard test equipment and chart.
* Cleans brine lines, using brushes and steam hose; and removes and dips sight glasses, nipples, bushings, elbows, tube assemblies, and rubber tubing in acid, solvent, or water bath to clean them.
* Examines chlorine lines for cracks, and cleans out orifices and vents.
* Changes chart recorders.
Industry:Professional careers
A professional who tends equipment that purifies glycerin by deionization process. Respnsibilities include:
* Starts pumps to force glycerin slurry through resin beds in series of purification tanks.
* Observes flowmeters and pressure gauges, and adjusts controls as necessary to meet process standards.
* Tests slurry for acidity periodically, using litmus paper.
* Draws samples of purified glycerin for laboratory analysis.
* Back-flushes tanks with acid solution to regenerate resin, as necessary.
Industry:Professional careers
A professional who tends equipment to remove impurities from water used in manufacturing pharmaceuticals and toilet preparations. Respnsibilities include:
* Starts pumps and turns valves to regulate flow of water into ion-exchanger to remove impurities such as magnesium and calcium.
* Activates electronic particle-detection devices to indicate level of impurities in treated water and automatically shut down system when impurities reach undesirable level, indicating need to regenerate system.
* Pumps water through tanks to flush system preparatory to regeneration.
* Circulates caustic solution through ion-exchanger to remove impurities from synthetic resins.
* Pumps water through system to rinse resin beds to remove caustic solution.
* Observes operation of pump units and pipe systems to detect leaks or mechanical defects.
* May tend water softener and demineralizing units to provide purified water for chemical process systems.
Industry:Professional careers
A professional who tends continuous oxide mill and auxiliary equipment that converts pig lead into lead oxide used in manufacture of storage battery paste. Respnsibilities include:
* Ignites furnace burner and loads pig lead into kettle that automatically melts lead and pours molten lead into machine that shapes lead into balls and discharges balls into storage bin.
* Rakes specified number of lead balls into mill that converts lead balls into lead oxide powder.
* Observes temperature and weight gauges, and turns valve to add coolant to mill as needed.
* Opens chute to release powder into barrel when milling is completed.
* Weighs and tests powder to determine percentage of oxidation, using reagents, gram scale, and other testing equipment.
* Reprocesses powder not meeting specifications.
* Records test results and amount of lead oxide powder milled.
Industry:Professional careers
A professional who tends catalytic reactor and auxiliary equipment that produce monovinylacetylene for use in neoprene rubber manufacture, as directed by mva-reactor operator, head. Respnsibilities include:
* Determines specific gravity of brine solution in drier unit, using hydrometer, and turns valve to circulate brine through saturator to maintain strength at plant standard.
* Weighs prescribed quantities of materials, dumps materials into mixing tanks to prepare brine solution, and opens valve to admit brine to drier as directed.
* Moves controls to start equipment that removes byproduct solution from drier by continuous flotation.
* Draws samples of materials as directed and determines acidity, using standard chemical test equipment and procedure.
* Maintains acidity at specified level in equipment to prevent explosion hazard.
* Drains and flushes saturators, using steam hose, and refills units with calcium chloride to maintain saturator efficiency.
Industry:Professional careers
A professional who tends vats that wash and treat nitroglycerin to neutralize acids remaining from nitrating process in explosives manufacture. Respnsibilities include:
* Admits warm water to vat of nitroglycerin, and introduces stream of air from bottom of vat to agitate and mix product for specified interval.
* Turns off water and air to allow mixture to settle and opens drain cock to draw off wash water.
* Admits prepared aqueous solution of soda ash to vat to neutralize remaining acids, and starts agitating airflow.
* Tests mixture with litmus or other chemical indicator, rewashes nitroglycerin when it tests neutral, and transfers it to storage or processing areas.
* May prepare soda-ash solution, according to formula or proportion table.
Industry:Professional careers
A professional who tends furnaces that convert litharge (yellow- or orange-colored monoxide) and lead tailings into red lead (lead oxide) for use in products, such as storage batteries, paints, and ceramics. Respnsibilities include:
* Ignites gas burners in furnace.
* Reads temperature gauge and adjusts controls to regulate flow of gas to maintain specified furnace temperature.
* Starts conveyor leading to furnace and dumps specified quantity of litharge or lead tailings onto conveyor.
* Starts furnace pan rotating to ensure uniform heating of material.
* Pulls lever to open door in bottom of furnace to drop powdered lead oxide onto conveyor leading to grinder.
* May test lead oxide, using beaker, acid, balance scale, and electric hotplate.
Industry:Professional careers
A professional who tends furnaces that convert litharge (yellow- or orange-colored monoxide) and lead tailings into red lead (lead oxide) for use in products, such as storage batteries, paints, and ceramics. Respnsibilities include:
* Ignites gas burners in furnace.
* Reads temperature gauge and adjusts controls to regulate flow of gas to maintain specified furnace temperature.
* Starts conveyor leading to furnace and dumps specified quantity of litharge or lead tailings onto conveyor.
* Starts furnace pan rotating to ensure uniform heating of material.
* Pulls lever to open door in bottom of furnace to drop powdered lead oxide onto conveyor leading to grinder.
* May test lead oxide, using beaker, acid, balance scale, and electric hotplate.
Industry:Professional careers
