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






3. Rubbers






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






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






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






7. Usually used together - strengthening and toughness






8. Good wear - case hardening. ball bearings






9. 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






10. AC to DC






11. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






13. Good high temp wear - tools






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






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






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






17. 1%<X<2% carbon. more cementite - used for files






18. 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






19. Elongation of grain flow in direction of rolling






20. Area load piston/area of effort piston






21. 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






22. 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






23. Ma/vr






24. 1/4 of the wavelength (higher better)






25. Soft - ductile






26. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






27. 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






28. 100khz






29. Area parallel to force






30. MA=VR






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






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






33. 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.






34. Resulting from exposure to damp environments and liquids.






35. These have weaker secondary bonds which allow the stretching






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






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






38. 10MHZ






39. When upper die is dropped on bottom






40. Low pressure

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






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






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






44. Load/area






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






46. Mass X gravity X height






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






48. 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.






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






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