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






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






3. Good toughness and fatigue. high strength structures






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






5. 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






6. 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






7. 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






8. 1/2Xmass X velocity X velocity






9. Horizontal






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






11. Soft - ductile






12. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






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






14. 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.






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






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






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






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






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






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






21. 100khz






22. 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






23. Us a metal that is more reactive. It is connect to another metal and corrodes instead of the other metal. the Anode is replaced periodically






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






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






26. 1%<X<2% carbon. more cementite - used for files






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






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






29. Ma/vr






30. Difference/original






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






32. Good wear - case hardening. ball bearings






33. Produces; harder - stronger and less ductile product






34. Vertical






35. Good high temp wear - tools






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






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






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






39. Area parallel to force






40. 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.






41. These have weaker secondary bonds which allow the stretching






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






43. High pressure

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44. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






45. Load/area






46. AC to DC






47. Elongation of grain flow in direction of rolling






48. Ma/vr x 100/1






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






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