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






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






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






4. Rubbers






5. Area load piston/area of effort piston






6. 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.






7. Usually used together - strengthening and toughness






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






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






10. Resulting from exposure to damp environments and liquids.






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






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






13. Better properties that would come from machining






14. 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






15. Load/area






16. Ma/vr x 100/1






17. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






18. Horizontal






19. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






20. 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.






21. 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






22. Elongation of grain flow in direction of rolling






23. Area parallel to force






24. 100GHZ+






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






26. Soft - ductile






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






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






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






30. 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






31. 100khz






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






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






34. 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






35. When upper die is dropped on bottom






36. Results from the changing anode and cathode regions over the entire surface






37. AC to DC






38. Ma/vr






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






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






41. 10MHZ






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






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






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






45. Hard - strong






46. Good wear - case hardening. ball bearings






47. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






48. 1GHZ






49. Mass X gravity X height






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