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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. 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






2. Usually used together - strengthening and toughness






3. 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






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






5. Ma/vr






6. 10MHZ






7. Load/effort






8. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






9. 1/2Xmass X velocity X velocity






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






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






12. Difference/original






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






14. Supply current to the rotating commutator from an external source






15. Area load piston/area of effort piston






16. AC to DC






17. Vertical






18. When upper die is dropped on bottom






19. Area parallel to force






20. Good wear - case hardening. ball bearings






21. 1/4 of the wavelength (higher better)






22. Produces; harder - stronger and less ductile product






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






24. Glass that is strengthened by introducing stress through rapid heating and cooling of the glass surfaces






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






26. Elongation of grain flow in direction of rolling






27. Good toughness and fatigue. high strength structures






28. 1%<X<2% carbon. more cementite - used for files






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






30. Forming of metal by compressive force above recrystallization point.






31. Mass X gravity X height






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






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






34. 100khz






35. 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.






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






37. Occurs when the metal is hammered by a vertically moving tool onto a stationary tool






38. Squeezing of the hot metal between two shaped dies excess is cut off






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






40. These have weaker secondary bonds which allow the stretching






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






42. Hard - strong






43. Low pressure

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44. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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






46. The quantity of information that can be transmitted through a communication medium in a given amount of time.






47. Good high temp wear - tools






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






49. 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.






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