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






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






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






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






5. Usually used together - strengthening and toughness






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






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






8. 1%<X<2% carbon. more cementite - used for files






9. Load/effort






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






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






12. 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






13. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






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






15. Horizontal






16. Difference/original






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






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






19. Good toughness and fatigue. high strength structures






20. Elongation of grain flow in direction of rolling






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






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






23. 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






24. High pressure

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25. 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






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






27. Area parallel to force






28. Resulting from exposure to damp environments and liquids.






29. 1/2Xmass X velocity X velocity






30. Good wear - case hardening. ball bearings






31. Rubbers






32. A flexible communications cable that contains pairs of insulated copper wires that are twisted together for reduction of EMI and RFI and covered with an outer insulating jacket.






33. 1GHZ






34. 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






35. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






36. Produces; harder - stronger and less ductile product






37. Soft - ductile






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






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






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. Mass X gravity X height






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






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






44. These have weaker secondary bonds which allow the stretching






45. 100khz






46. Good high temp wear - tools






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






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






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






50. AC to DC