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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 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.






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






3. 1/4 of the wavelength (higher better)






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






5. These have weaker secondary bonds which allow the stretching






6. Horizontal






7. Vertical






8. Mass X gravity X height






9. 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.






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






11. Ma/vr x 100/1






12. Soft - ductile






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






14. Elongation of grain flow in direction of rolling






15. Resulting from exposure to damp environments and liquids.






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






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






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






19. MA=VR






20. Usually used together - strengthening and toughness






21. Produces; harder - stronger and less ductile product






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






23. Hard - strong






24. When upper die is dropped on bottom






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






26. 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






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






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






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






30. 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






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






32. 10MHZ






33. Good toughness and fatigue. high strength structures






34. Ma/vr






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






36. 1%<X<2% carbon. more cementite - used for files






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






38. Difference/original






39. 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






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






41. Good wear - case hardening. ball bearings






42. 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






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






44. 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






45. 1GHZ






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






47. 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






48. 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






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






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