- Industry: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who supervises and coordinates activities of workers engaged in washing, crushing, and screening sand and gravel to produce aggregate of specified size for use as ingredients in making concrete.
* Directs workers in adjusting equipment and replacing screens to regulate size of aggregate.
* Performs other duties as described under supervisor master title.
Industry:Professional careers
A professional who controls conveyors and blending equipment to mix materials according to specification for use in cementing oil and gas wells. Respnsibilities include:
* Operates electric-powered winch to spot railroad cars over underground hoppers.
* Breaks seal and opens bottom-dump doors on car with prybar to unload cement and other materials in hopper.
* Presses button to start conveyor which transfers materials to storage bins.
* Pulls levers and presses switches to start and stop conveyors and blending equipment and to open and close discharge gates on storage bins.
* Empties sacks of additive chemicals into blender hoppers to prepare dry cement mixtures, following formulas.
* Prepares delivery tickets (call sheets) and weighs trucks and materials as loaded.
* Records quantities of materials received and issued on inventory control records.
* Estimates materials in bulk storage bins periodically to verify inventory records.
* Requisitions materials to replenish stocks.
Industry:Professional careers
A professional who operates crushers, mixers, and blenders to grind, mix, and temper clay for use in molding ceramics products. Respnsibilities include:
* Drives liftscoop tractor to convey clay from storage piles or bins and dumps material on crusher pit grates.
* Breaks up clay with bar or sledge.
* Starts crusher, conveyors, elevator, and vibrating screens to grind raw materials to specified size and to transport ground materials to storage bins.
* Examines screens and clears blockages, using wire brush.
* Weighs and dumps raw materials into mixing machine, following formula.
* Starts mixer and turns valve to feed water into mixing machine.
* Inserts instrument into mixture to measure water content.
* Discharges mixture onto conveyors leading to blending machine.
* Starts blending machine that mulls mixture into tempered clay.
* May be designated according to machine operated as blender operator; crusher operator; mixer operator; or according to kind of materials processed as clay-dry-press-mixer operator; silica-mixer operator.
Industry:Professional careers
A professional who controls equipment to weigh and mix gypsum with specified proportions of fiber, retarder, perlite, and other additives to make plaster. Respnsibilities include:
* Starts mixing machine and sets weigh hopper.
* Engages screw feeder that feeds specified amount of gypsum from storage bin into weigh hopper.
* Weighs additives according to specifications and dumps them into hopper.
* Opens gate of hopper to drop ingredients into mixer.
* Opens mixer gate after specified time to discharge mixed plaster product into packer hopper.
* May fill bags with mixed plaster.
Industry:Professional careers
A professional who controls grinders, mixers, and conveyors to prepare ingredients for plaster wallboard and feed prepared ingredients into hopper of board machine. Respnsibilities include:
* Transfers gypsum, flour, potash, soap, lime, and other materials from storage area to supply tanks, using handtruck or powered truck or conveyor.
* Dumps ingredients into agitator tanks according to formula to mix edge glue and soap solution.
* Feeds materials, in specified proportions, into machine hopper, by pump line and conveyor.
* Reads tank dials and flowmeters to determine reserve of materials in tanks and rate of flow of materials into machine hopper.
* Regulates feeders and pumps, using handtools, to ensure continuous supply of ingredients into hopper.
* May operate hydropulper to grind and mix paper into pulp slurry for use as additive.
Industry:Professional careers
A professional who operates blunger (mixing machine) and auxiliary equipment to blend and mix clay into semiliquid for use in casting ceramic ware. Respnsibilities include:
* Dumps sacks of clay into conveyor to charge blunger.
* Turns valve to admit water into blunger.
* Starts blunger that mixes clay into semiliquid.
* Stops blunger and places hydrometer in semiliquid to determine specific gravity.
* Adds water or clay to obtain mixture of specific gravity.
* Regulates valves to discharge mixture over screens, agitators, and magnets to remove iron or steel in mixture.
* Removes excess water from mixture with vacuum filter.
* Washes screens and magnets to remove foreign particles and sludge, using hose.
* May mix clays according to formula.
Industry:Professional careers
A professional who combines resin, diamond, and silicone carbide powders to form mixture for use in molding diamond-abrasive grinding wheels, following formulas and using scraper, spatula, plate glass, and gram weight balance. Respnsibilities include:
* Selects mixing formula from book according to type of wheel to be molded.
* Weighs ingredients separately on gram weight balance, and dumps ingredients onto plate glass.
* Mixes powders on plate glass, and dumps mixture into jar, using scraper and spatula.
* Caps jar, using rolling machine.
* Removes jar after specified time from machine.
* Labels jar to identify mixture with type of wheel to be molded.
Industry:Professional careers
A professional who tends machine that mixes abrasive compounds for use in making polishing and buffing wheels, and hones. Respnsibilities include:
* Calculates amount of grit, clay, and adhesive required according to formulas.
* Weighs out ingredients, dumps ingredients into mixing machine, and starts mixing machine.
* Feels mixture and adds water and resins until specified consistency is attained.
* Scoops mixed compound into oscillating sieve to screen out lumps and oversized granules.
* Dumps compound into barrels for further processing.
* Records quantities of ingredients used in each mix.
Industry:Professional careers
A professional who tends series of dry-pans, screens, and conveyors that grind, sift, and convey dry clay to storage tanks. Respnsibilities include:
* Signals overhead crane operator to load clay into hoppers of dry-pans.
* Turns valves to feed water into pans.
* Starts equipment that grinds and sifts clay.
* Starts and regulates speed of conveyors and elevators to transport clay to storage tanks.
* Removes rocks or other obstructions from dry-pans and screens, using pry bars and wire brushes.
* Breaks up lumps of clay, using sledgehammer.
* Observes panel lights for indications of equipment failures.
* Adjusts, tightens, or replaces wire screens, using handtools.
Industry:Professional careers
A professional who tends series of dry-pans, screens, and conveyors that grind, sift, and convey dry clay to storage tanks. Respnsibilities include:
* Signals overhead crane operator to load clay into hoppers of dry-pans.
* Turns valves to feed water into pans.
* Starts equipment that grinds and sifts clay.
* Starts and regulates speed of conveyors and elevators to transport clay to storage tanks.
* Removes rocks or other obstructions from dry-pans and screens, using pry bars and wire brushes.
* Breaks up lumps of clay, using sledgehammer.
* Observes panel lights for indications of equipment failures.
* Adjusts, tightens, or replaces wire screens, using handtools.
Industry:Professional careers
