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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 method of transmitting signals by changing the frequency of a wave






2. Better properties that would come from machining






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






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






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






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






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






8. Area load piston/area of effort piston






9. AC to DC






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






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






12. Hard - strong






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






14. Produces; harder - stronger and less ductile product






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






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






17. Low pressure

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18. Usually used together - strengthening and toughness






19. Horizontal






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






21. Elongation of grain flow in direction of rolling






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






23. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles






24. Resulting from exposure to damp environments and liquids.






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






26. 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






27. MA=VR






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






29. 100GHZ+






30. 1%<X<2% carbon. more cementite - used for files






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






32. 100khz






33. 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






34. 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






35. 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






36. Rubbers






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






38. 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.






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






40. Ma/vr






41. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






42. 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






43. Soft - ductile






44. Load/effort






45. 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






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






47. Hard - brittle






48. 1/4 of the wavelength (higher better)






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






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