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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. 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






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






3. Ma/vr






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






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






6. Low pressure

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7. 100GHZ+






8. Load/effort






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






10. 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






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






12. 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






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






14. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






15. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






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






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






19. Hard - brittle






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






21. 100khz






22. Better properties that would come from machining






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






24. 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.






25. 1%<X<2% carbon. more cementite - used for files






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






27. 10MHZ






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






29. When upper die is dropped on bottom






30. 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






31. 1/2Xmass X velocity X velocity






32. These have weaker secondary bonds which allow the stretching






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






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






35. Usually used together - strengthening and toughness






36. Vertical






37. 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






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






39. AC to DC






40. Difference/original






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






42. High pressure

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






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






45. Area parallel to force






46. 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






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






48. Ma/vr x 100/1






49. MA=VR






50. 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






Can you answer 50 questions in 15 minutes?



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