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






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






3. Area parallel to force






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






5. 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.






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






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






8. Produces; harder - stronger and less ductile product






9. 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






10. Good wear - case hardening. ball bearings






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






12. Hard - brittle






13. Mass X gravity X height






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






15. Low pressure

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






17. When upper die is dropped on bottom






18. 1/4 of the wavelength (higher better)






19. Resulting from exposure to damp environments and liquids.






20. Elongation of grain flow in direction of rolling






21. 100khz






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






23. 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






24. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






26. Good toughness and fatigue. high strength structures






27. Difference/original






28. The quantity of information that can be transmitted through a communication medium in a given amount of time.






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






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






31. 1%<X<2% carbon. more cementite - used for files






32. 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.






33. 100GHZ+






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






35. 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






36. 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






37. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






38. AC to DC






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






40. 1/2Xmass X velocity X velocity






41. 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






42. 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






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






44. Soft - ductile






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






46. Area load piston/area of effort piston






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






48. Horizontal






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






50. Usually used together - strengthening and toughness