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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 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






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






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






4. MA=VR






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






6. Good high temp wear - tools






7. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






8. 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






9. 100GHZ+






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






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






12. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






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






15. Low pressure

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16. High pressure

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17. 1%<X<2% carbon. more cementite - used for files






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






19. Solid at room temp - weak secondary bonds. can be reheated multiply times.






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






21. These have weaker secondary bonds which allow the stretching






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






23. Good toughness and fatigue. high strength structures






24. Horizontal






25. 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.






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






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






28. 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






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






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






31. Ma/vr






32. Load/area






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






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






35. 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






36. Between 2000-35 -700km above the earth's surface.






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






38. Soft - ductile






39. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






40. Elongation of grain flow in direction of rolling






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






42. Vertical






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






44. Produces; harder - stronger and less ductile product






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






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






47. Area load piston/area of effort piston






48. 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






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






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