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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. Vertical






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






3. 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






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






5. Mass X gravity X height






6. Low pressure


7. Good high temp wear - tools






8. 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.






9. 1GHZ






10. 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






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






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






13. MA=VR






14. 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






15. Elongation of grain flow in direction of rolling






16. Resulting from exposure to damp environments and liquids.






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






18. 100khz






19. Ma/vr






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






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






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






23. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






25. When upper die is dropped on bottom






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






27. Horizontal






28. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






30. 10MHZ






31. Soft - ductile






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






33. 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






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






35. 1/4 of the wavelength (higher better)






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






37. Better properties that would come from machining






38. 1%<X<2% carbon. more cementite - used for files






39. 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.






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






41. Good wear - case hardening. ball bearings






42. 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






43. 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






44. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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






46. Load/area






47. High pressure


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






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






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