- 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
