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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 method of transmitting signals by changing the frequency of a wave






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






3. Ma/vr






4. 1GHZ






5. Solid at room temp - weak secondary bonds. can be reheated multiply times.






6. 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






7. 100khz






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






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






10. Resulting from exposure to damp environments and liquids.






11. Low pressure

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






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






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






15. 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






16. Hard - strong






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






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






19. Load/area






20. 1/4 of the wavelength (higher better)






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






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






23. AC to DC






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






25. 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.






26. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






27. Ma/vr x 100/1






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






29. Elongation of grain flow in direction of rolling






30. Produces; harder - stronger and less ductile product






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






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






33. Soft - ductile






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






35. Rubbers






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






37. Load/effort






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






39. 10MHZ






40. Glass made with plates of plastic or resin or other material between two sheets of glass to prevent shattering






41. MA=VR






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






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






44. Good wear - case hardening. ball bearings






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






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






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






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






49. Vertical






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