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






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






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






4. Good toughness and fatigue. high strength structures






5. High pressure

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






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






8. 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






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






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






11. 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.






12. 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.






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






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






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






16. Resulting from exposure to damp environments and liquids.






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






18. Area parallel to force






19. Area load piston/area of effort piston






20. Good wear - case hardening. ball bearings






21. 1/4 of the wavelength (higher better)






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






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






24. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






25. Load/area






26. Horizontal






27. Ma/vr x 100/1






28. When upper die is dropped on bottom






29. MA=VR






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






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






32. Rubbers






33. Ma/vr






34. Mass X gravity X height






35. 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






36. Vertical






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






38. Elongation of grain flow in direction of rolling






39. 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






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






41. Produces; harder - stronger and less ductile product






42. 1/2Xmass X velocity X velocity






43. AC to DC






44. 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






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






46. These have weaker secondary bonds which allow the stretching






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






48. 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






49. Better properties that would come from machining






50. 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