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






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






3. Resulting from exposure to damp environments and liquids.






4. 1GHZ






5. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






7. Rubbers






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






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






10. 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.






11. 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.






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






13. These have weaker secondary bonds which allow the stretching






14. 1/4 of the wavelength (higher better)






15. 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






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






17. Low pressure

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18. Load/effort






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






20. Hard - brittle






21. Good toughness and fatigue. high strength structures






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






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






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






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






26. AC to DC






27. Horizontal






28. 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






29. Good high temp wear - tools






30. Hard - strong






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






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






33. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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






35. 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






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






37. Ma/vr






38. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






39. Good wear - case hardening. ball bearings






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






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






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






43. 100GHZ+






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






45. Usually used together - strengthening and toughness






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






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






49. Ma/vr x 100/1






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