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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. These have weaker secondary bonds which allow the stretching






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






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






5. 100GHZ+






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






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






8. Load/effort






9. High pressure

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10. 1/4 of the wavelength (higher better)






11. Hard - brittle






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






13. 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






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






15. 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






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






17. Ma/vr x 100/1






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






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






20. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film






21. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






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






24. 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






25. Vertical






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






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






28. Low pressure

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






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






31. Ma/vr






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






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






34. Produces; harder - stronger and less ductile product






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






36. 100khz






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






38. 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






39. Load/area






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






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






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






43. Soft - ductile






44. AC to DC






45. An orbit in which a satellite orbits Earth at the same rate as Earth rotates and thus stays over the same place all the time






46. 1GHZ






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






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






49. Elongation of grain flow in direction of rolling






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