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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. 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.






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






3. MA=VR






4. 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






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






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






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






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






9. 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






10. Ma/vr x 100/1






11. Resulting from exposure to damp environments and liquids.






12. When upper die is dropped on bottom






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






14. Hard - brittle






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






16. 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






17. 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






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






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






20. Soft - ductile






21. Rubbers






22. Horizontal






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






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






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






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






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






28. Hard - strong






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






30. 10MHZ






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






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






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






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






35. Ma/vr






36. High pressure

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






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






39. Better properties that would come from machining






40. 1/4 of the wavelength (higher better)






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






42. 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






43. 100GHZ+






44. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






45. 1%<X<2% carbon. more cementite - used for files






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






47. 1GHZ






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






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






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