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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. Sound waves sent through a material - much like sonar. Internal defects appear because they use more energy to go through it.






2. 1/2Xmass X velocity X velocity






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






4. Produces; harder - stronger and less ductile product






5. 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






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






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






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






9. Rubbers






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






11. Soaked cast iron at 870c for long time then cooled slow






12. 100GHZ+






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






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






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






16. Area parallel to force






17. Hard - strong






18. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






19. Horizontal






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






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






22. Dye is sprayed onto a surface - with excess being wiped away - meaning any left on the piece would be in cracks that exist in it. A developer is then added to it to expose any left over - I.e in the cracks






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






24. 100khz






25. These have weaker secondary bonds which allow the stretching






26. Low pressure

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27. The greater the sulphur the harder the rubber to stretch






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






29. 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.






30. 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






31. MA=VR






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






33. 1GHZ






34. Difference/original






35. An orbit in which a satellite orbits Earth at the same rate as Earth rotates and thus stays over the same place all the time






36. Allows for another signal to be sent along the carrier signal






37. Area load piston/area of effort piston






38. Soft - ductile






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






40. Load/effort






41. 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.






42. Degradation of a signal as it travels over a cable. Attenuation increased with higher frequencies






43. Usually used together - strengthening and toughness






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






45. High pressure

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46. Good high temp wear - tools






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






48. Load/area






49. Mass X gravity X height






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