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






2. 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






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 Fluorescent light is turned on to expose any left over - I.e in the cracks






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






5. Better properties that would come from machining






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






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






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






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






10. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






12. Usually used together - strengthening and toughness






13. Soft - ductile






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






15. Mass X gravity X height






16. 100khz






17. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






18. Load/area






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






20. Ma/vr






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






22. AC to DC






23. 1%<X<2% carbon. more cementite - used for files






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






25. Good high temp wear - tools






26. Good toughness and fatigue. high strength structures






27. An orbit in which a satellite orbits Earth at the same rate as Earth rotates and thus stays over the same place all the time






28. High pressure


29. Resulting from exposure to damp environments and liquids.






30. Steel reinforcing rusts - rust has a greater volume concrete then breaks of as a result.






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. These have weaker secondary bonds which allow the stretching






33. 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






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






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






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






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






38. Good wear - case hardening. ball bearings






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






40. 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.






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






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






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






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






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






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






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






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






49. Rubbers






50. Difference/original