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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. Hard - strong






3. 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.






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






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






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






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






8. Hard - brittle






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






10. Difference/original






11. Good high temp wear - tools






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






13. Resulting from exposure to damp environments and liquids.






14. Horizontal






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 Fluorescent light is turned on to expose any left over - I.e in the cracks






16. Elongation of grain flow in direction of rolling






17. 1GHZ






18. Produces; harder - stronger and less ductile product






19. 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






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






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






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






24. When upper die is dropped on bottom






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






26. Soft - ductile






27. Area parallel to force






28. Low pressure

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29. AC to DC






30. 1/4 of the wavelength (higher better)






31. 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.






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






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






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






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






36. Good wear - case hardening. ball bearings






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






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






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






40. 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






41. 100khz






42. 1/2Xmass X velocity X velocity






43. 1%<X<2% carbon. more cementite - used for files






44. Good toughness and fatigue. high strength structures






45. 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






46. Area load piston/area of effort piston






47. Rubbers






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






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






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