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Engineering Studies

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Softening a material such as metal by controlled heating and cooling. This makes the metal less brittle and more easily adaptable. Soaking till austenite then cooling slowly. large grains






2. A method of transmitting signals by changing the frequency of a wave






3. Can only be softened once - bonded strongly - generally stronger that thermoplastics. stronger secondary bonds






4. Load/area






5. Majority silicon X>1.5% for graphite. Graphite in flakes that cause stress points






6. Usually used together - strengthening and toughness






7. Produces; harder - stronger and less ductile product






8. Soft - ductile






9. A solid state component made from three layers of semiconductor material that can amplify the strenght of an electric signal or act as an electronic switch






10. Better properties that would come from machining






11. These have weaker secondary bonds which allow the stretching






12. 1/4 of the wavelength (higher better)






13. Good toughness and fatigue. high strength structures






14. Low pressure

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15. A strong hard building material composed of sand and gravel and cement and water






16. Us a metal that is more reactive. It is connect to another metal and corrodes instead of the other metal. the Anode is replaced periodically






17. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






18. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film






19. Load/effort






20. Area parallel to force






21. Solid at room temp - weak secondary bonds. can be reheated multiply times.






22. Resulting from exposure to oxygen in the atmosphere - chemical fumes - steam - flue gas. creates a layer of metal oxide.






23. Makes brittle by heating and then cooling quickly - less flexible. Red Heat then quenching






24. Can be reflected of the ionosphere - 3 to 30 megahertz






25. Used where scarifical anodes cannot supply enough protection - offshore oil rigs - buried pipes - big things. protection is provided by connecting a rectifier to provide a direct current source between the anode and the metal being protected.






26. Hard - strong






27. Good high temp wear - tools






28. A motor that is light - rugged and very reliable - runs on ac current and are more common in robotics. Can only run at a certain speed






29. Mass X gravity X height






30. Ma/vr x 100/1






31. Being forced - under pressure - through a hole like toothpaste. either hot or cold






32. Ma/vr






33. 1GHZ






34. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






35. A cable made of optical fibers that can transmit large amounts of information at the speed of light






36. Vertical






37. A device that converts the AC inside a DC generator to a DC output or converts a DC supply to an AC inside a DC motor.keeping the armature rotating






38. A flexible communications cable that contains pairs of insulated copper wires that are twisted together for reduction of EMI and RFI and covered with an outer insulating jacket.






39. A method of transmitting signals by changing the amplitude of a waves






40. x<0.15% carbon. ferrite. good for cold working - rolling sheets






41. Steel reinforcing rusts - rust has a greater volume concrete then breaks of as a result.






42. X<1% silicon no graphite - has carbon/carbide. very brittle






43. 1/2Xmass X velocity X velocity






44. Controlled cooling after heating metal to attain a degree of hardness. removes internal stresses






45. Results from the changing anode and cathode regions over the entire surface






46. Small amounts of magnesium to make spheres instead of flakes. thus no stress concentrations






47. Between 2000-35 -700km above the earth's surface.






48. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






49. 100khz






50. Based on the principle that magnetic materials will have distorted magnetic fields in the vicinity of material defects