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






2. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






3. 1/2Xmass X velocity X velocity






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






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






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






7. Good toughness and fatigue. high strength structures






8. 100GHZ+






9. Low pressure


10. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






11. Load/effort






12. These have weaker secondary bonds which allow the stretching






13. Area parallel to force






14. High pressure


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






16. 1%<X<2% carbon. more cementite - used for files






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






18. Better properties that would come from machining






19. Vertical






20. 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






21. Produces; harder - stronger and less ductile product






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






23. Resulting from exposure to damp environments and liquids.






24. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






26. Good wear - case hardening. ball bearings






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






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






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






30. Ma/vr






31. Usually used together - strengthening and toughness






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






33. Hard - strong






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






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






36. 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






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






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






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






40. 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






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






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






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






44. 100khz






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






46. MA=VR






47. AC to DC






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






49. 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






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