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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. 100GHZ+






4. 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






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






6. 1/4 of the wavelength (higher better)






7. Low pressure

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






9. Ma/vr x 100/1






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






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






12. Rubbers






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






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






15. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






16. Mass X gravity X height






17. 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.






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






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






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






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






22. Usually used together - strengthening and toughness






23. 1/2Xmass X velocity X velocity






24. High pressure

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25. Vertical






26. 100khz






27. 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






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






29. 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






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






31. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






33. Better properties that would come from machining






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






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






36. When upper die is dropped on bottom






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






38. 10MHZ






39. Soft - ductile






40. 1GHZ






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






42. Area parallel to force






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






44. 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.






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






46. Load/area






47. Hard - brittle






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






49. 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






50. MA=VR