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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. Rubbers






3. 100GHZ+






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






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






6. Good high temp wear - tools






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






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






9. Better properties that would come from machining






10. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






11. Usually used together - strengthening and toughness






12. 10MHZ






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






14. Hard - strong






15. Low pressure

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16. 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.






17. AC to DC






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






19. Vertical






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






21. Mass X gravity X height






22. 1/4 of the wavelength (higher better)






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






24. Difference/original






25. Ma/vr






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






27. 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






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






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






30. Horizontal






31. Produces; harder - stronger and less ductile product






32. Hard - brittle






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






34. Good toughness and fatigue. high strength structures






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






36. Sound waves sent through a material - much like sonar. Internal defects appear because they use more energy to go through it.






37. 1%<X<2% carbon. more cementite - used for files






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






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






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






41. 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






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






43. 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






44. 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.






45. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






46. 1GHZ






47. 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






48. When upper die is dropped on bottom






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






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