- Settore: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who charges ground scrap rubber into devulcanizers that process rubber with chemicals and steam. Respnsibilities include:
* Pulls levers to drop measured amount of rubber into scale hopper.
* Pushes loaded hopper along monorail and pulls lever to dump contents into machine.
* Signals devulcanizer tender when machines are loaded.
* May measure and pour specified pigments, caustics, and oils into devulcanizer.
* May observe gauges and turn valves to relieve steam pressure in devulcanizer preparatory to unloading and blow devulcanized rubber through tubes into storage bins.
Industry:Professional careers
A professional who charges ground scrap rubber into devulcanizers that process rubber with chemicals and steam. Respnsibilities include:
* Pulls levers to drop measured amount of rubber into scale hopper.
* Pushes loaded hopper along monorail and pulls lever to dump contents into machine.
* Signals devulcanizer tender when machines are loaded.
* May measure and pour specified pigments, caustics, and oils into devulcanizer.
* May observe gauges and turn valves to relieve steam pressure in devulcanizer preparatory to unloading and blow devulcanized rubber through tubes into storage bins.
Industry:Professional careers
A professional who operates cracking (recovery) unit of lead pots and condensers to vaporize and condense scrap plastics materials and recover monomer. Respnsibilities include:
* Unbolts and removes side covers from lead pot, using handtools, and charges it with lead pigs.
* Adjusts controls of oil burner to melt lead at specified temperature.
* Sets pressure regulators to supply specified quantity of carbon dioxide to lead pot to eliminate formation of explosive mixture and observes process to detect leaks.
* Turns screw feed controls to regulate flow of scrap materials into molten lead.
* Adjusts controls on condensers which automatically recover monomer from solvent and pumps cracked monomer to storage tanks.
* Dismantles lead pot.
* Drains lead into molds.
Industry:Professional careers
A professional who operates cracking (recovery) unit of lead pots and condensers to vaporize and condense scrap plastics materials and recover monomer. Respnsibilities include:
* Unbolts and removes side covers from lead pot, using handtools, and charges it with lead pigs.
* Adjusts controls of oil burner to melt lead at specified temperature.
* Sets pressure regulators to supply specified quantity of carbon dioxide to lead pot to eliminate formation of explosive mixture and observes process to detect leaks.
* Turns screw feed controls to regulate flow of scrap materials into molten lead.
* Adjusts controls on condensers which automatically recover monomer from solvent and pumps cracked monomer to storage tanks.
* Dismantles lead pot.
* Drains lead into molds.
Industry:Professional careers
A professional who controls equipment that dissolves and precipitates chemicals used in manufacturing chemical products, such as butadiene and styrene. Respnsibilities include:
* Pumps chemical solutions through premeasuring tanks, dissolver tanks, and precipitator tanks, observes thermometers, and turns valves to maintain temperature in tanks within specified limits to dissolve and precipitate solutions.
* Starts tank agitator to mix solution for prescribed time.
* Titrates sample of solution and inserts hydrometer to determine acidity and specific gravity of product.
* Observes flowmeters and turns valves to regulate flow of ingredients through tanks to alter concentration and produce product meeting specified standard.
* Pumps or drains remaining solutions from precipitate and turns valves to transfer product for further processing, shipment, or storage.
* When controlling precipitator tanks only, may be designated Precipitator Operator.
* When dumping caustic soda cake into dissolving tanks and controlling tanks to produce solution of specified concentration, may be designated bottom-liquor attendant.
Industry:Professional careers
A professional who controls fermentation chambers and tanks to produce enzymes from fungal or bacterial growth for use as industrial catalysts. Respnsibilities include:
* Sprinkles seed from hand container into mixing drum containing culture medium, such as bran, and starts drum revolving for specified time to disperse seed throughout medium.
* Opens drum to discharge batch into tubs, and shovels batch onto trays.
* Places trays on racks and pushes them into growing chambers.
* Sets thermostats, observes pressure gauges and meters, and moves controls to maintain specified atmospheric conditions that promote growth of culture.
* Examines batch for contamination by smell, touch, or observation, using knowledge of fermentation reactions.
* Removes trays from chamber after specified time.
* Dumps contents onto conveyor that transfers material through delumping machine into portable tanks.
* Positions tanks under water faucets and opens valves to flush enzymes through sieve.
* Turns valve to siphon solution through series of portable tanks into head tank.
* Tests extraction for specific gravity, acidity, and alkalinity, using hydrometer and litmus paper; and adds specified salts, acids, or bases.
* May start centrifuge to separate solids from product.
Industry:Professional careers
A professional who controls distillation equipment to recover sulfuric and nitric acids from residue produced in manufacturing TNT and nitroglycerin. Respnsibilities include:
* Turns valves and observes gauges and instruments to regulate flow of acids, steam, and water into denitrator tower to liberate nitric fumes, and to effect absorption of fumes in absorption towers for recovering acid of specified concentration.
* Draws acid samples for laboratory testing and pumps acid to storage tanks after laboratory approval.
* May determine concentration of acid, using hydrometer.
Industry:Professional careers
A professional who tends batch still and polymerization vessel to distill and polymerize acrylic acid used in production of plastics. Respnsibilities include:
* Tends laboratory-type batch still to vaporize and condense acrylic acid.
* Measures amount of distillate, using burette or gauging rod, and pours distilled acid into water-jacketed polymerization vessel.
* Heats vessel to prescribed temperature, and adds specified quantity of reagents to effect polymerization.
* Draws samples of product for laboratory analysis.
* Turns valves to transfer polymerized acid to storage or processing areas.
Industry:Professional careers
A professional who tends ball mill and auxiliary equipment to produce sodium salicylate for use in production of salicylic acid. Respnsibilities include:
* Opens valves to transfer specified quantities of sodium hydroxide and phenol solutions to tank, and starts agitators to mix solutions to form mixture of sodium phenate and water.
* Drains mixture into ball mill (closed metal tank), opens exhaust valve, and starts heaters to evaporate water from sodium phenate.
* Observes moisture indicators to determine when water has been removed from sodium phenate.
* Pumps cold water into jacket of ball mill to contract mill walls sufficiently to loosen pulpy sodium phenate.
* Heats ball mill to specified temperature, increases pressure in ball mill to required level, and pumps carbon dioxide into ball mill to change sodium phenate to sodium salicylate.
* Opens vents to rid sodium salicylate of excess carbon dioxide.
* Pumps specified quantity of water into ball mill to dissolve sodium salicylate, and pumps sodium salicylate solution into tanks for further processing into salicylic acid.
Industry:Professional careers
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
