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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. Elongation of grain flow in direction of rolling






2. 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.






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






4. Area parallel to force






5. Horizontal






6. Rubbers






7. AC to DC






8. 1GHZ






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






10. Difference/original






11. When upper die is dropped on bottom






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






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






14. These have weaker secondary bonds which allow the stretching






15. Load/effort






16. Ma/vr x 100/1






17. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






19. 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






20. Mass X gravity X height






21. Low pressure

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22. 100khz






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






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






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






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






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






28. 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.






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






30. Good toughness and fatigue. high strength structures






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






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






33. 1/2Xmass X velocity X velocity






34. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






35. 10MHZ






36. Area load piston/area of effort piston






37. 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






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






39. 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






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






41. High pressure

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42. Resulting from exposure to oxygen in the atmosphere - chemical fumes - steam - flue gas. creates a layer of metal oxide.






43. 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






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






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






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






47. 100GHZ+






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






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






50. 1/4 of the wavelength (higher better)