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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. 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






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






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






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






5. Ma/vr x 100/1






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






7. High pressure

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8. Better properties that would come from machining






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






10. Good high temp wear - tools






11. Usually used together - strengthening and toughness






12. 100khz






13. 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






14. 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.






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






16. 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






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






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






19. Resulting from exposure to damp environments and liquids.






20. 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






21. Elongation of grain flow in direction of rolling






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






23. Produces; harder - stronger and less ductile product






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






25. Rubbers






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






27. 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.






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






29. MA=VR






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






31. Low pressure

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






33. Soft - ductile






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






35. 10MHZ






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






37. Horizontal






38. 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






39. These have weaker secondary bonds which allow the stretching






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






41. 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






42. Area load piston/area of effort piston






43. Good wear - case hardening. ball bearings






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






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






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






47. Vertical






48. Difference/original






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






50. 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