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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. 100khz






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






3. Resulting from combined effect of stresses set up within the metal






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






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






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






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






8. 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.






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






10. 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






11. 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






12. 1/2Xmass X velocity X velocity






13. AC to DC






14. Elongation of grain flow in direction of rolling






15. 1%<X<2% carbon. more cementite - used for files






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






17. These have weaker secondary bonds which allow the stretching






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






19. Usually used together - strengthening and toughness






20. Horizontal






21. Load/area






22. Area load piston/area of effort piston






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






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






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






26. Vertical






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






28. 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






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






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






31. 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.






32. Better properties that would come from machining






33. Good toughness and fatigue. high strength structures






34. Hard - brittle






35. An orbit less than 1 -500 km. above the Earth's surface.






36. 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






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






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






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






40. 1/4 of the wavelength (higher better)






41. Hard - strong






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






43. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






45. Low pressure

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46. 1GHZ






47. Mass X gravity X height






48. 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






49. Resulting from exposure to damp environments and liquids.






50. Difference/original