Test your basic knowledge |

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. Hard - strong






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






3. 1GHZ






4. 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






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






6. When upper die is dropped on bottom






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






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






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






10. 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






11. MA=VR






12. Usually used together - strengthening and toughness






13. 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






14. 10MHZ






15. 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.






16. Produces; harder - stronger and less ductile product






17. 1/4 of the wavelength (higher better)






18. 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.






19. Mass X gravity X height






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






21. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






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






24. These have weaker secondary bonds which allow the stretching






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






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






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






28. Load/effort






29. 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






30. Good toughness and fatigue. high strength structures






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






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






33. 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






34. 1%<X<2% carbon. more cementite - used for files






35. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






36. Area parallel to force






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






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






39. Hard - brittle






40. Better properties that would come from machining






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






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






43. Load/area






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






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






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






47. Horizontal






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






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






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