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






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






3. Ma/vr x 100/1






4. Area load piston/area of effort piston






5. 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






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






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






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






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






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






11. 1%<X<2% carbon. more cementite - used for files






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






13. 10MHZ






14. AC to DC






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






16. Load/effort






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






18. Ma/vr






19. High pressure

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20. Hard - brittle






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






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






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






24. Load/area






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






26. 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






27. 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






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






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






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






31. Good high temp wear - tools






32. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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






34. Soft - ductile






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






36. MA=VR






37. 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






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






39. Good toughness and fatigue. high strength structures






40. These have weaker secondary bonds which allow the stretching






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






42. Vertical






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






44. When upper die is dropped on bottom






45. 1/2Xmass X velocity X velocity






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






47. Difference/original






48. Horizontal






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






50. Elongation of grain flow in direction of rolling