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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. 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.






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






3. 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






4. Good high temp wear - tools






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






6. Hard - strong






7. Mass X gravity X height






8. Area parallel to force






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






10. Good wear - case hardening. ball bearings






11. Ma/vr






12. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






13. 1/2Xmass X velocity X velocity






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






15. Better properties that would come from machining






16. Ma/vr x 100/1






17. 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






18. These have weaker secondary bonds which allow the stretching






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






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






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






22. Resulting from exposure to damp environments and liquids.






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






24. Low pressure

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






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






27. 100GHZ+






28. 100khz






29. Elongation of grain flow in direction of rolling






30. Difference/original






31. Horizontal






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






33. 1/4 of the wavelength (higher better)






34. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






35. When upper die is dropped on bottom






36. 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






37. Load/area






38. 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






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






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






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






42. MA=VR






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






44. 1%<X<2% carbon. more cementite - used for files






45. 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






46. Usually used together - strengthening and toughness






47. Load/effort






48. Area load piston/area of effort piston






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






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