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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. Supply current to the rotating commutator from an external source






2. 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






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






4. Rubbers






5. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






6. Resulting from exposure to damp environments and liquids.






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






8. Soft - ductile






9. 1/4 of the wavelength (higher better)






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






11. Ma/vr x 100/1






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






13. Hard - brittle






14. These have weaker secondary bonds which allow the stretching






15. 1/2Xmass X velocity X velocity






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






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






18. 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






19. Horizontal






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






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






22. High pressure

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23. Usually used together - strengthening and toughness






24. Mass X gravity X height






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






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






27. Hard - strong






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






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






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






31. Vertical






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






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






34. 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






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






36. Better properties that would come from machining






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






38. A device that converts the AC inside a DC generator to a DC output or converts a DC supply to an AC inside a DC motor.keeping the armature rotating






39. 1%<X<2% carbon. more cementite - used for files






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






41. 1GHZ






42. 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.






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






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






45. Load/effort






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






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






48. Good wear - case hardening. ball bearings






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






50. Elongation of grain flow in direction of rolling