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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. Hard - brittle






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






3. 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






4. 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.






5. AC to DC






6. 100GHZ+






7. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






8. 1/2Xmass X velocity X velocity






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






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






11. 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






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






13. Difference/original






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






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






16. 1GHZ






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






18. 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






19. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






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






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






23. Ma/vr






24. MA=VR






25. Resulting from exposure to damp environments and liquids.






26. Load/effort






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






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






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






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






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






32. High pressure

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33. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






34. 1/4 of the wavelength (higher better)






35. 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






36. Area parallel to force






37. Glass made with plates of plastic or resin or other material between two sheets of glass to prevent shattering






38. Elongation of grain flow in direction of rolling






39. Forming of metal by compressive force above recrystallization point.






40. Horizontal






41. When upper die is dropped on bottom






42. Low pressure

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






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






45. Rubbers






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






47. Produces; harder - stronger and less ductile product






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






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