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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. Good wear - case hardening. ball bearings






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






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






4. 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






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






6. Resulting from exposure to damp environments and liquids.






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






8. 1/4 of the wavelength (higher better)






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






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






11. AC to DC






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






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






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






15. Hard - brittle






16. Ma/vr






17. Better properties that would come from machining






18. 1%<X<2% carbon. more cementite - used for files






19. Load/area






20. 10MHZ






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






22. High pressure


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






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






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






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






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






28. Difference/original






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






30. 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






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






32. 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.






33. 100GHZ+






34. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






35. Produces; harder - stronger and less ductile product






36. X<1% silicon no graphite - has carbon/carbide. very brittle






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






38. 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






39. 1/2Xmass X velocity X velocity






40. Vertical






41. 1GHZ






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






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






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






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






46. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






47. Load/effort






48. Good toughness and fatigue. high strength structures






49. Low pressure


50. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles