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






2. Rubbers






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






4. Hard - brittle






5. 1%<X<2% carbon. more cementite - used for files






6. Area parallel to force






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






8. Better properties that would come from machining






9. 100GHZ+






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






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






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






13. 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






14. Resulting from exposure to damp environments and liquids.






15. 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.






16. Good toughness and fatigue. high strength structures






17. 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






18. Ma/vr x 100/1






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






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






21. Area load piston/area of effort piston






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






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






24. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






25. AC to DC






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






27. 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






28. Soft - ductile






29. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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






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






32. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






34. Mass X gravity X height






35. Horizontal






36. Hard - strong






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






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






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






40. Load/effort






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






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






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






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






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






46. Usually used together - strengthening and toughness






47. 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






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






49. MA=VR






50. Good wear - case hardening. ball bearings