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






2. Hard - strong






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






4. Load/area






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






6. 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.






7. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






9. 1GHZ






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






11. 1/4 of the wavelength (higher better)






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






13. Difference/original






14. Mass X gravity X height






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. AC to DC






17. These have weaker secondary bonds which allow the stretching






18. Usually used together - strengthening and toughness






19. 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






20. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






22. 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






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






24. 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






25. Better properties that would come from machining






26. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






27. 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






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






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






30. Vertical






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






32. When upper die is dropped on bottom






33. Area load piston/area of effort piston






34. Produces; harder - stronger and less ductile product






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






36. Elongation of grain flow in direction of rolling






37. 100khz






38. Hard - brittle






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






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






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






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






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






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






45. 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.






46. 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






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






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






49. Load/effort






50. Rubbers







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