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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. 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






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






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






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






5. Soft - ductile






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






7. Ma/vr x 100/1






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






9. 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






10. 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






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






12. MA=VR






13. AC to DC






14. Mass X gravity X height






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






16. 1GHZ






17. When upper die is dropped on bottom






18. 10MHZ






19. 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






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






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






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






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






24. Horizontal






25. 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.






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






27. 100khz






28. 100GHZ+






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






30. High pressure

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31. These have weaker secondary bonds which allow the stretching






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






33. 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






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






35. Supply current to the rotating commutator from an external source






36. Elongation of grain flow in direction of rolling






37. Usually used together - strengthening and toughness






38. 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






39. Good wear - case hardening. ball bearings






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






41. Load/area






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






43. Ma/vr






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






45. 1/2Xmass X velocity X velocity






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






47. Low pressure

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48. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






49. 1%<X<2% carbon. more cementite - used for files






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