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






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






3. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






4. Difference/original






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






6. When upper die is dropped on bottom






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






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






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






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






11. 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






12. Vertical






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






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






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






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






17. 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






18. Soft - ductile






19. Good high temp wear - tools






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






21. 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.






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






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






24. Better properties that would come from machining






25. Hard - brittle






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






27. Good toughness and fatigue. high strength structures






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






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






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






31. 100khz






32. Hard - strong






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






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






35. 1/2Xmass X velocity X velocity






36. 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






37. Usually used together - strengthening and toughness






38. AC to DC






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






40. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






41. Low pressure

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






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






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






45. Resulting from exposure to damp environments and liquids.






46. Ma/vr






47. Mass X gravity X height






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






49. 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.






50. These have weaker secondary bonds which allow the stretching