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






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






3. These have weaker secondary bonds which allow the stretching






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






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






6. 100GHZ+






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






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






9. 10MHZ






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






11. Maximum bending moments X distance to natural axis/ second moment of area






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






13. Usually used together - strengthening and toughness






14. Load/area






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






16. 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.






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






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






19. Difference/original






20. Produces; harder - stronger and less ductile product






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






22. 100khz






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






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






25. Area parallel to force






26. Good high temp wear - tools






27. Better properties that would come from machining






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






29. 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






30. Rubbers






31. Soft - ductile






32. Mass X gravity X height






33. 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.






34. Load/effort






35. Good wear - case hardening. ball bearings






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






37. 1/2Xmass X velocity X velocity






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






39. 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






40. When upper die is dropped on bottom






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






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






43. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






45. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film






46. Hard - strong






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






48. Horizontal






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






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