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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 be reflected of the ionosphere - 3 to 30 megahertz






2. 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






3. Ma/vr






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






5. AC to DC






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






7. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






9. Resulting from exposure to damp environments and liquids.






10. Elongation of grain flow in direction of rolling






11. Hard - brittle






12. Load/area






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






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






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






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






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






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






19. Low pressure

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






21. 1GHZ






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






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






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






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






26. 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






27. 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.






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






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






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






31. 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






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






33. Better properties that would come from machining






34. Area load piston/area of effort piston






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






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






37. High pressure

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






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. Good wear - case hardening. ball bearings






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






42. 1/4 of the wavelength (higher better)






43. Horizontal






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






45. 100khz






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






47. Good toughness and fatigue. high strength structures






48. Rubbers






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. Good high temp wear - tools