- Industry: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who determines density and resistance of carbon samples which have been graphitized and inspects graphitized stock after removal from furnace. Respnsibilities include:
* Marks samples of green stock before graphitization to indicate their position in furnace.
* Receives samples from furnace unloader before remaining charge is unloaded.
* Cleans samples with scraper and steel wool and weighs them.
* Measures samples in several places with diameter rule to obtain average diameter.
* Places samples on resistance-testing device, sets meter to allow specified number of amperes to pass through sample, and records readings from millivoltmeter.
* Calculates average density and average resistance from weight, average diameter, and millivolt reading, using slide rule and formula.
* When furnace is unloaded, marks pieces with resistance grade number of samples.
* Inspects cleaned stock for pits, cracks, burrs, and bends.
* Determines extent of damage from cracks and imperfections, and marks salvageable pieces for cutting to next largest possible size.
* Directs workers to remove inspected pieces.
Industry:Professional careers
A professional who tests samples of milled rubber compounds and finished rubber goods, using testing devices, and compares gauge readings against prepared standards, such as charts, graphs, and tables, to verify adherence to specifications. Respnsibilities include:
* Collects samples of rubber from mixing-machine operator at prescribed intervals.
* Mixes and blends sample stock on laboratory warmer mill to obtain desired consistency and tests sample for plasticity, using plastometer.
* Cures uncured rubber samples in heated mold at specified temperature for designated time and tests its hardness, using durometer.
* Determines density of cured and uncured stock by weighing samples on scale and testing sample in densimeter.
* Records test results for use by control laboratory.
Industry:Professional careers
A professional who operates stills, pumps, and related equipment to extract and refine ammonia from ammonia liquor. Respnsibilities include:
* Adjusts feed valves to regulate flow of liquor and steam to stills and water to condensers and dephlegmator.
* Reads thermometers and gauges, adjusts valves, and regulates pumps to maintain specified temperatures and pressures to boil off waste vapors (foul vent) and ammonia.
* Pumps ammonia to saturator for mixing with water to produce liquid ammonia, and pumps ammonia to storage tanks.
* Pumps waste liquor to sewer.
* Determines amount of ammonia in waste liquor and water, using titrattion test, and adjusts temperatures and pressures to reduce loss of ammonia.
* Keeps record of pressures, temperatures, test results, and amount of liquor and steam fed to stills.
* May produce concentrated ammonia liquor by condensing vapors in water-cooled condensers.
* Cleans work area, using broom, brushes, and lime.
Industry:Professional careers
A professional who operates stills, pumps, and related equipment to extract and refine ammonia from ammonia liquor. Respnsibilities include:
* Adjusts feed valves to regulate flow of liquor and steam to stills and water to condensers and dephlegmator.
* Reads thermometers and gauges, adjusts valves, and regulates pumps to maintain specified temperatures and pressures to boil off waste vapors (foul vent) and ammonia.
* Pumps ammonia to saturator for mixing with water to produce liquid ammonia, and pumps ammonia to storage tanks.
* Pumps waste liquor to sewer.
* Determines amount of ammonia in waste liquor and water, using titrattion test, and adjusts temperatures and pressures to reduce loss of ammonia.
* Keeps record of pressures, temperatures, test results, and amount of liquor and steam fed to stills.
* May produce concentrated ammonia liquor by condensing vapors in water-cooled condensers.
* Cleans work area, using broom, brushes, and lime.
Industry:Professional careers
A professional who controls machines that combine ingredients, such as sodium silicate, sulfuric acid, water, and caustic soda to make catalysts used in manufacture of high-octane gasolines. Respnsibilities include:
* Dumps dry ingredients into electric mixing vats and turns valves to admit prescribed amounts of liquid ingredients.
* Observes thermometers and flowmeters, and adjusts gauges to control temperature and amount of flow.
* Turns valves to allow mixture to flow from mixing vats to vacuum filters to remove excess water.
* Controls pumps that force mixture through spray-dryers where particles of catalyst are formed, and turns dials on control panel to regulate temperature and speed of spray.
* Controls pumping of catalyst particles from bottom of dryers to washer-filters for removal of cation and anion impurities.
* Turns valves to regulate flow of catalyst through hot-air steam dryers and observes temperature and speed of flow to ensure specified drying.
* May draw off samples of mixture for analysis.
* May keep records of batches processed.
Industry:Professional careers
A professional who controls equipment units or system that processes chemical substances into specified industrial or consumer products, according to knowledge of operating procedures, chemical reactions, laboratory test results, and correlation of process instrumentation. Respnsibilities include:
* Reads plant specifications to ascertain product, ingredients, and prescribed modifications of plant procedures.
* Starts automatic feed of solid or semisolid materials through equipment units, such as heating vessels and mixing tanks; or dumps preweighed ingredients into tanks, hoppers, or onto conveyor.
* Moves controls to regulate feed of liquids and gases through equipment in specified timing and sequence, or starts automatic feed.
* Sets up and adjusts indicating and controlling devices, such as gas analyzers, recording calorimeters, and radiographic detecting or gauging instruments to facilitate simultaneous analysis and control of process conditions.
* Observes gauges, signals, and recording instruments, turns valves, and moves controls to regulate temperatures, pressures, and flow of steam, coolant, and chemical constituents through system to effect prescribed reaction within critical limits, according to knowledge of equipment and process.
* Draws samples of product at specified stages of synthesis and performs litmus, titration, refractometer, gas-analyses, or other standard tests to determine if reaction is proceeding efficiently and in conformity with plant standards.
* Observes color or consistency of product through sight glasses, and correlates observations with test results, laboratory analyses, and instrument readings to facilitate regulation of process and production of standardized product.
* Maintains log of gauge readings, shift production, and equipment malfunctions.
* May patrol area to inspect equipment for leaks and hazards and to record gauge readings.
* May direct activities of other workers assisting in control or verification of process.
* May be designated according to equipment or system controlled as caustic-purification operator; gas-generator operator; lanolin-plant operator; sulfonator operator; or according to product produced as alkylation operator; ethylene-oxide panelboard operator; polymer operator; sodium-chlorite operator.
Industry:Professional careers
A professional who controls pressure, temperature, and water level of cooking tanks, and operates centrifuges and separators, to manufacture animal glue. Respnsibilities include:
* Admits hot water and steam into cooking tanks containing crushed animal bones, following specifications.
* Opens valves to drain glue and tallow solutions (grease) into separate vats.
* Starts centrifuge machine that separates animal oils (grease) from glue solution.
* Cooks glue solution to evaporate water from glue.
* Reads gauge of hydrometer to determine percentage of glue solid in solution.
* Disassembles plates of centrifuge, using wrench and hoisting device; and cleans plates, using brush and abrasives.
* May weigh and add specified amounts of chemical to preserve glue.
* May direct other workers engaged in cleaning tanks or vats.
Industry:Professional careers
A professional who operates mixing and milling machines to mix and granulate powdered ingredients preparatory to compressing into medicinal tablets. Respnsibilities include:
* Weighs out and measures ingredients, according to formula and size of batch to be mixed.
* Starts mixing machine to blend ingredients and adds starch paste, gelatin, or water and alcohol solution to mixture to bind ingredients.
* Breaks up lumps in mixture, using spatula or mortar and pestle, spreads mixture onto trays, and places trays in oven or steam drier at preset temperature.
* Removes trays and feels material to ascertain dryness, or tests material with moisture meter to determine whether batch requires additional mixing or drying.
* Installs cutting blades and screens, using handtools, and operates oscillating or comminuting mill to force mixture through sieves and produce product of specified fineness.
* May screen granulated mixture to determine size range of granules.
* May tend ion-exchange equipment to remove mineral salts from water.
* May tend tumbling barrel or other equipment to mix binders, flavoring oils, and lubricating agents for use in compounding tablets.
Industry:Professional careers
A professional who operates equipment that refines raw linseed oil for use in manufacture of paint, lacquers, white lead paste, and high-speed printing ink. Respnsibilities include:
* Starts pump to transfer raw linseed oil from storage tank into refining tank, and starts agitator paddles.
* Opens valve to drain settled tar and foreign matter from tank.
* Opens tank steam valve to heat mixture.
* Sprays hot water over oil with hose to neutralize acid and allows water to settle.
* Opens valve to drain water from tank.
* Starts agitator paddles and adds dry neutralizing ingredients, such as whiting compound, powdered magnesia, and common salt.
* Observes material during refining process to determine if color and consistency meets standards, and removes sample for laboratory tests.
* Opens valve to permit oil to flow into storage tank.
* Sets thermostat and steam valve to maintain required temperature in storage tank.
Industry:Professional careers
A professional who controls equipment to prepare chemical constituents of synthetic rubber for synthesis by other workers, following formulas and maintaining reactions within prescribed limits. Respnsibilities include:
* Weighs solid materials according to formula, using scale.
* Pumps liquid chemicals to metering or weigh tanks.
* Observes thermometer and recording instruments, and moves heater controls to attain specified temperature in system.
* Starts agitator and opens valves to regulate admission of chemical agents into mixing tanks in prescribed sequence.
* Dumps solid materials into tanks to complete reaction.
* Draws samples of solution for laboratory analysis and titrates sample to determine concentration and facilitate control of materials flow for attainment of product meeting plant standard.
* Tends auxiliary equipment, such as colloid mills, melt tanks, scrubbers, and homogenizers, to prepare or further process emulsions and dispersions.
* Regulates flow of rubber constituents to storage or rubber-synthesis areas, according to schedule or indicated plant needs.
* Maintains records of materials and supplies, shift production, process times and temperatures, and gauge readings for operating log or inventory records.
* May receive and store materials.
* May tend tank farm containing liquid chemicals.
* May clean, inspect, and recharge equipment with materials, such as soda ash or calcium chloride.
* May be designated according to substance prepared as emulsion operator; persulfate make-up operator; or equipment unit operated as chlorobutadiene-scrubber operator.
Industry:Professional careers
