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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 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






2. 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.






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






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






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






6. Vertical






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






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






9. Hard - strong






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






11. 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






12. Mass X gravity X height






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






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






15. 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






16. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






17. When upper die is dropped on bottom






18. 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






19. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






20. Ma/vr






21. 1%<X<2% carbon. more cementite - used for files






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






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






24. Good toughness and fatigue. high strength structures






25. Forming of metal by compressive force above recrystallization point.






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






27. 1/4 of the wavelength (higher better)






28. Produces; harder - stronger and less ductile product






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






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






31. Horizontal






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






33. Elongation of grain flow in direction of rolling






34. Low pressure

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






36. High pressure

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






38. Ma/vr x 100/1






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






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






41. Hard - brittle






42. Resulting from exposure to damp environments and liquids.






43. 1GHZ






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. Area parallel to force






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






47. 100khz






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






49. These have weaker secondary bonds which allow the stretching






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