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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. Supply current to the rotating commutator from an external source






2. Load/area






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






4. 100GHZ+






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






6. 1%<X<2% carbon. more cementite - used for files






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






8. Low pressure

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9. 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.






10. AC to DC






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






12. Load/effort






13. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






14. High pressure

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15. Better properties that would come from machining






16. Softening a material such as metal by controlled heating and cooling. This makes the metal less brittle and more easily adaptable. Soaking till austenite then cooling slowly. large grains






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






18. 100khz






19. 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






20. 1/4 of the wavelength (higher better)






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






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






23. Horizontal






24. Produces; harder - stronger and less ductile product






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






26. Ma/vr






27. 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






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






29. Difference/original






30. Hard - brittle






31. Ma/vr x 100/1






32. Good toughness and fatigue. high strength structures






33. 1/2Xmass X velocity X velocity






34. Area parallel to force






35. 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






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






37. Resulting from exposure to damp environments and liquids.






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






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






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






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






42. Hard - strong






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






44. Good high temp wear - tools






45. Mass X gravity X height






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






47. 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.






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






49. 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






50. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear