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






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






3. 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






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






5. 1/4 of the wavelength (higher better)






6. Soft - ductile






7. 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






8. Good toughness and fatigue. high strength structures






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






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






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






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






13. Ma/vr






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






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






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






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






18. Low pressure

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19. 100GHZ+






20. Better properties that would come from machining






21. 10MHZ






22. Resulting from exposure to damp environments and liquids.






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






24. Produces; harder - stronger and less ductile product






25. Us a metal that is more reactive. It is connect to another metal and corrodes instead of the other metal. the Anode is replaced periodically






26. High pressure

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






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






29. 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






30. 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






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






32. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






33. AC to DC






34. Load/area






35. MA=VR






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






37. Ma/vr x 100/1






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






39. Good high temp wear - tools






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






41. 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






42. Vertical






43. Elongation of grain flow in direction of rolling






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






45. 1/2Xmass X velocity X velocity






46. When upper die is dropped on bottom






47. Good wear - case hardening. ball bearings






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






49. Mass X gravity X height






50. A method of transmitting signals by changing the frequency of a wave