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






3. Vertical






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






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






6. Better properties that would come from machining






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






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






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






10. Elongation of grain flow in direction of rolling






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






12. Usually used together - strengthening and toughness






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






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






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






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






17. When upper die is dropped on bottom






18. Ma/vr x 100/1






19. MA=VR






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






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






22. 1/4 of the wavelength (higher better)






23. Hard - brittle






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






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






26. Produces; harder - stronger and less ductile product






27. Area load piston/area of effort piston






28. 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






29. 1%<X<2% carbon. more cementite - used for files






30. 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.






31. Resulting from exposure to damp environments and liquids.






32. Good wear - case hardening. ball bearings






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






34. 1GHZ






35. Rubbers






36. Load/effort






37. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






38. 10MHZ






39. Difference/original






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






41. Horizontal






42. Mass X gravity X height






43. 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.






44. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






45. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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. 1/2Xmass X velocity X velocity






48. 100GHZ+






49. 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






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