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






2. When upper die is dropped on bottom






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






4. 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






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






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






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






8. Soft - ductile






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






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






11. 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






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






13. Good toughness and fatigue. high strength structures






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






15. Mass X gravity X height






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






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






18. 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






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






20. Horizontal






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






22. Elongation of grain flow in direction of rolling






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






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






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






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






27. Vertical






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






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






30. 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.






31. Usually used together - strengthening and toughness






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






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






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






35. Produces; harder - stronger and less ductile product






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






37. 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






38. These have weaker secondary bonds which allow the stretching






39. 1/4 of the wavelength (higher better)






40. Low pressure

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41. AC to DC






42. 1%<X<2% carbon. more cementite - used for files






43. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






45. Difference/original






46. Ma/vr x 100/1






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






48. High pressure

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49. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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