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U.S. Department of Labor
Industry: Government; Labor
Number of terms: 77176
Number of blossaries: 0
Company Profile:
A professional who controls single-stage or multiple-effect evaporators to concentrate chemical solutions to specified density by evaporation. Respnsibilities include: * Starts pumps and turns valves to admit liquid solution, steam, and cooling water into system. * Observes temperature, pressure, and vacuum gauge readings and adjusts pumps to conform to specifications. * Turns feed valves to regulate flow of solution through system and to obtain specified concentration. * Tests solution pumped from last effect, using hydrometer, to ascertain that solution is concentrated to specified density. * Observes manometers and looks through sight glass to ensure that steam vapors are not carried to next effect with solution. * Tests steam condensate with reagents to detect contaminated solution. * May control equipment from instrumented control board. * May tend equipment, such as preheaters, thickeners, settlers, and filters, that prepare solution for evaporation. * May clean evaporator shell and tube nest with chemical to remove scale. * May operate multiple-effect unit as one or more single evaporators.
Industry:Professional careers
A professional who controls equipment to melt, cook, and mix ingredients, such as gums, oils, turpentine, and naphtha, for use in manufacture of varnishes. Respnsibilities include: * Weighs gum and dumps it into gum pot or agitator tank over burner. * Pours in oil, as gum becomes liquid, and adjusts burner controls to regulate heat. * Controls burners to cook mixture for specified time. * Starts pump to transfer varnish base and thinner into reducing tank. * Starts agitator to mix base and thinner for specified time. * Fills test tube with varnish and compares viscosity with standard sample, or delivers test tube to laboratory for test. * Pumps varnish through filter press to remove sediment from varnish.
Industry:Professional careers
A professional who sets up and operates hydraulic press equipped with heated platens to bond metal aircraft and space vehicle parts and assemblies. Respnsibilities include: * Reads blueprints and shop orders to determine areas of parts to be joined, amount of bonding agent to apply, and temperature and pressure required. * Examines parts or assemblies for surface defects and positions parts on machine bed, using jigs or fixtures. * Applies adhesives to surfaces to be bonded. * Installs thermocouple leads to machine, using handtools. * Starts machine and adjusts controls to regulate pressure, heat, and curing time. * May assemble parts prior to aligning them in machine. * May operate autoclaves and ovens to cure and bond parts and assemblies.
Industry:Professional careers
A professional who sets up and operates hydraulic press equipped with heated platens to bond metal aircraft and space vehicle parts and assemblies. Respnsibilities include: * Reads blueprints and shop orders to determine areas of parts to be joined, amount of bonding agent to apply, and temperature and pressure required. * Examines parts or assemblies for surface defects and positions parts on machine bed, using jigs or fixtures. * Applies adhesives to surfaces to be bonded. * Installs thermocouple leads to machine, using handtools. * Starts machine and adjusts controls to regulate pressure, heat, and curing time. * May assemble parts prior to aligning them in machine. * May operate autoclaves and ovens to cure and bond parts and assemblies.
Industry:Professional careers
A professional who tends vacuum tank that dries priming mixture, and dries and stores loaded cartridge primers and primed rim-fire cartridge cases. Respnsibilities include: * Transfers trays or boards filled with explosive primers or cases from loading room to steam-heated dryhouse, using shockproof cart. * Places filled trays in numbered racks or bins. * Reads gauges and turns valves to control temperature in dryhouse. * Collects primers and cases from storage to fill requisitions and keeps perpetual inventory. * Loads primers on screen trays of vacuum tank and starts vacuum pump, steam heat, and fans that force-dry priming mixture when requisitions do not permit sufficient time for air drying. * May deliver primers and cases to production departments and record date, lot number, and grade.
Industry:Professional careers
A professional who controls continuous process equipment to age alkali cellulose for use in cellophane manufacture. Respnsibilities include: * Takes wet and dry-bulb temperature readings in air ducts through which cellulose will pass on conveyor and calculates humidity in ducts, using graphs. * Reads instruction tables to determine setting of conveyor screws and belts under existing humidity conditions. * Turns screws to adjust conveyor speed to regulate length of aging cycle, and to set humidistat that maintains specified humidity in ducts. * Records operating data.
Industry:Professional careers
A professional who performs variety of duties to assist calcine-furnace tender in baking pigments to bring out color. Respnsibilities include: * Scoops dry blend of pigments from drums into clay saggers (pigment containers) and stacks saggers on bed of kiln. * Positions kiln bed on hydraulic lift, using forklift. * Moves controls of hydraulic lift to raise kiln bed into overhead kiln and secures bed in kiln. * Removes bed from kiln on signal from calcine-furnace tender and empties saggers of calcined pigments into drum. * Weighs and tags drum and moves it to storage area, using handtruck. * May load saggers of dry blend onto revolving track of circular kiln for continuous-calcination process. * Performs other duties as described under helper master title.
Industry:Professional careers
A professional who tends equipment, such as centrifuge and rotary drier, that removes moisture and recovers plastic resin from slurry. Respnsibilities include: * Observes gauges, turns valves, and starts pumps to regulate flow of slurry from storage tank to centrifuge. * Starts centrifuge to separate resin from slurry and observes flow of partially dried resins into rotary drier. * Observes gauges and turns valves to regulate flow of hot air and maintain specified temperature in drier. * May tend pneumatic conveyor that carries dried resin into storage silos. * May measure level of stored materials in silo, using calibrated plumbline.
Industry:Professional careers
A professional who operates atmospheric tunnel driers that heat liquids or slurries to remove water or other volatile liquids. Respnsibilities include: * Moves controls to regulate preheaters, fans, and conveyor belts or other material feeding mechanisms to maintain continuous operation. * Turns steam valves and sets automatic temperature controls to attain specified drying temperature. * Observes temperature charts and conveyors to correct equipment malfunctions and jamming of feed or discharge conveyors. * Examines and feels materials for moisture content or obtains sample for laboratory moisture analysis, and readjusts equipment controls to attain specified product. * Stops drier units in sequence as material feed is exhausted. * Records data, such as type and quantity of material dried and drying time. * May tend continuous pan driers that automatically transfer materials through drier in pans on conveyor chains, and dumps dried contents after drying. * May tend or feed auxiliary equipment, such as grinding mills and baling machines that process dried product. * May be designated according to type of drier as continuous-conveyor-screen drier.
Industry:Professional careers
A professional who controls heated pots to dehydrate concentrated caustic solution, according to operating procedures. Respnsibilities include: * Starts pumps and opens valves to admit specified quantity of caustic solution to pots. * Reads pressure and flowmeters and charts, and turns valves to control flow of caustic liquor to prevent overflow in pots. * Observes boiling rate and temperature recorders and turns valves or sets thermostat to maintain pot temperature within specified limits. * Records flow, pressure, and temperature readings in operating log. * May perform chemical tests on caustic and add reagents to facilitate production of standard product. * May tend machine that flakes caustic soda. * May fire oil or gas furnaces under direction of stationary engineer.
Industry:Professional careers