Copyright © Philip M. Parker, INSEAD. Terms of Use.
| Domain | Definition |
Occupations | Performs combination of following duties to produce solid-propellant rocket fuel, prepare rocket motor cases for inserting propellant, cast and cure propellant, install propellant and ignition components in motor case, prepare assembly for static testing, and pack assembly for shipment: Blends fuel ingredients and tends roller mill that grinds mixture to uniform consistency from remote control instrument panel, viewing operations on television monitor. Lowers motor case into degreasing pit filled with solvent, using hoist. Transfers case to sandblasting cabinet and starts compressor to sandblast unit, removing rust and scale. Paints motor case, using spray gun. Weighs out prescribed ingredients for insulating interior of case and starts agitator in mixing tank to blend ingredients to desired consistency. Sprays insulating liner onto case interior, using spray gun. Hoists case into oven to cure lining preparatory to inserting propellant. Fills fuel transfer can with propellant mixture, according to prescribed safety procedures, bolts lid onto can, and starts vibrator to remove air bubbles from mixture. Transfers filled can to casting area, using lift truck. Brushes mold-releasing lubricant onto casting core to facilitate removal of propellant after curing. Positions motor case in rack or pit and aligns casting core in case, using gauge and following markings on case interior. Couples safety hose to valve in lid of transfer can and turns air valves to force propellant into case. Bolts hydraulic jack to retainer ring of case and turns valve from behind safety barrier to force core into position, using system of mirrors to regulate movement of core. Slips plastic bag and metal cap over assembly and transfers filled case to curing oven. Sets automatic temperature controls of oven according to critical specifications for each type of propellant and size of motor. Removes casting core from propellant after prescribed curing time, using hydraulic jack, and trims excess propellant from rim of case, using remote controlled air-powered knives. Secures retaining collars, exhaust nozzle, ignition cable, and igniter motor in motor case, using torque and impact wrenches, to ensure alignment of all components. Hoists motor onto cradle of scale and records weight. Determines center of gravity of assembly, using centering devices and standard formula. Stencils identity and motor specifications on case, using stencil and roller. Prepares assemblies for static testing by transferring units to and from temperature-controlled rooms, securing them to test stand, recording test instrument readings, and disassembling faulty units for inspection. Slides completed assemblies into pressurized shipping containers, using hoist and aligning devices to prevent damage during shipment. Seals container, using gaskets, bolts, tape, resilient packing, and moisture-absorbing agents. May be known as Mold-Release Worker (chemical); Rocket-Assembly Operator (chemical). When casting smaller fuel elements in molds to produce free-standing grain (fuel element), wrapping grain in inhibitor sheath to control rate of burning, and manually loading grain into motor case or container, is designated Technical Operator, Grain Preparation (chemical). (references) |
| Controls chemical-processing equipment to recover tungsten oxide from ground concentrated ore: Starts conveyor to fill reactor tank with ore. Turns valves to pump specified quantity of hydrochloric acid into tank and to admit steam into tank jacket. Observes temperature gauge and adjusts valves to maintain acid solution at specified temperature for specified time. Fills tank with water to wash slurry, and drains waste-bearing water. Turns valve to pour slurry into caustic tank. Precipitates impurities, such as chlorides and oxides, by adding ammonia and sulfuric acid to solution. Filters solution into holding tank to remove precipitate. Adds specified amount of hydrochloric acid to tank to crystallize solution. Dries tungsten oxide crystals by pumping them through filter or centrifuge. (references) | |
Source: compiled by the editor from various references; see credits. | |
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day |
chemical operator | 5 |
| Source: compiled by the editor from various references; see credits. | |
Scrabble® Enable2K-Verified Anagrams | |
| Words within the letters "a-a-c-c-e-e-h-i-l-m-o-o-p-r-r-t" | |
-3 letters: cephalometric, petrochemical. | |
-4 letters: apochromatic, electrophori, metaphorical. | |
-5 letters: accelerator, ameliorator, calorimeter, chocolatier, colorimeter, ectomorphic, malpractice, perchlorate, polarimeter, prothoracic, reciprocate. | |
| Words containing the letters "a-a-c-c-e-e-h-i-l-m-o-o-p-r-r-t" | |
+5 letters: electromyographically. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
Hexadecimal (or equivalents, 770AD-1900s) (references)43 48 45 4D 49 43 41 4C 4F 50 45 52 41 54 4F 52 |
| Leonardo da Vinci (1452-1519; backwards) (references)
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Binary Code (1918-1938, probably earlier) (references)01000011 01001000 01000101 01001101 01001001 01000011 01000001 01001100 00100000 01001111 01010000 01000101 01010010 01000001 01010100 01001111 01010010 |
HTML Code (1990) (references)C H E M I C A L   O P E R A T O R |
ISO 10646 (1991-1993) (references)0043 0048 0045 004D 0049 0043 0041 004C 004F 0050 0045 0052 0041 0054 004F 0052 |
Encryption (beginner's substitution cypher): (references)374239474337354624950395235544952 |
| 1. Expressions: Internet 2. Anagrams 3. Orthography 4. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
