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






2. 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.






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






4. These have weaker secondary bonds which allow the stretching






5. 1/2Xmass X velocity X velocity






6. 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






7. Good toughness and fatigue. high strength structures






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






9. 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






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






11. Ma/vr x 100/1






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






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






14. 1GHZ






15. Good wear - case hardening. ball bearings






16. Better properties that would come from machining






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






18. Horizontal






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






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






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






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






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






24. 1%<X<2% carbon. more cementite - used for files






25. Rubbers






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






27. MA=VR






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






29. 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






30. Hard - brittle






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






32. 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






33. 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






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






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






36. AC to DC






37. Load/effort






38. 100khz






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






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






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






42. 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 Fluorescent light is turned on to expose any left over - I.e in the cracks






43. Produces; harder - stronger and less ductile product






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






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






46. Low pressure

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






48. 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






49. Maximum bending moments X distance to natural axis/ second moment of area






50. High pressure

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