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






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






3. Area parallel to force






4. Good toughness and fatigue. high strength structures






5. Low pressure

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






7. Difference/original






8. 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






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






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






11. Vertical






12. Load/effort






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






14. Better properties that would come from machining






15. Ma/vr x 100/1






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






17. Ma/vr






18. 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






19. These have weaker secondary bonds which allow the stretching






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






21. 1/2Xmass X velocity X velocity






22. 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






23. Good high temp wear - tools






24. Field winding parallel to armature winding. Bad for direct coupling






25. When upper die is dropped on bottom






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






27. 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.






28. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






29. MA=VR






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






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






33. Elongation of grain flow in direction of rolling






34. 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.






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






36. Mass X gravity X height






37. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






38. Load/area






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






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






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






42. AC to DC






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






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






45. Produces; harder - stronger and less ductile product






46. Involves heating the piece above Red heat and then letting it cool in air. causes smaller grains






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






48. Good wear - case hardening. ball bearings






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






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