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






2. 1/4 of the wavelength (higher better)






3. Better properties that would come from machining






4. Ma/vr






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






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






7. 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






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






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






10. 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.






11. Horizontal






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






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






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






15. 1%<X<2% carbon. more cementite - used for files






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






17. Soft - ductile






18. 10MHZ






19. 1GHZ






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






21. 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






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






23. 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






24. Good toughness and fatigue. high strength structures






25. 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.






26. Resulting from exposure to damp environments and liquids.






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






28. Difference/original






29. Good wear - case hardening. ball bearings






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. Load/area






32. Low pressure

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






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






35. 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






36. 100GHZ+






37. Good high temp wear - tools






38. Rubbers






39. MA=VR






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






41. 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






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






43. Hard - strong






44. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






45. Produces; harder - stronger and less ductile product






46. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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






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






49. Ma/vr x 100/1






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