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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. 1/4 of the wavelength (higher better)






2. Elongation of grain flow in direction of rolling






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






4. Good wear - case hardening. ball bearings






5. 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






6. 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






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






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






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






10. 1/2Xmass X velocity X velocity






11. High pressure

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






13. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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






15. 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






16. 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.






17. Rubbers






18. Soft - ductile






19. Area load piston/area of effort piston






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






22. Low pressure

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23. Load/effort






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






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






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






27. Hard - strong






28. Usually used together - strengthening and toughness






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






30. 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






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






32. 10MHZ






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






34. MA=VR






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






36. When upper die is dropped on bottom






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






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






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






40. These have weaker secondary bonds which allow the stretching






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






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






43. 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






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






45. Good high temp wear - tools






46. 1%<X<2% carbon. more cementite - used for files






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






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






49. 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






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