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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. Ma/vr x 100/1






2. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






3. Hard - brittle






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






5. 1/4 of the wavelength (higher better)






6. 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






7. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






8. Produces; harder - stronger and less ductile product






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






10. Good wear - case hardening. ball bearings






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






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






13. Usually used together - strengthening and toughness






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






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






16. Better properties that would come from machining






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






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






19. MA=VR






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






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






22. Area load piston/area of effort piston






23. Difference/original






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






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






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






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






28. Horizontal






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






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






31. Low pressure

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32. 1%<X<2% carbon. more cementite - used for files






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






34. 100khz






35. 10MHZ






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






37. Good high temp wear - tools






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






39. Area parallel to force






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






41. Vertical






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






43. 100GHZ+






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






45. 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.






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






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






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






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






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