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






2. Load/area






3. 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






4. 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






5. When upper die is dropped on bottom






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






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






8. 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






9. 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






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






11. Area load piston/area of effort piston






12. Hard - strong






13. 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






14. Good wear - case hardening. ball bearings






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






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






17. 100GHZ+






18. MA=VR






19. 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.






20. 1/4 of the wavelength (higher better)






21. High pressure

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22. These have weaker secondary bonds which allow the stretching






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






24. Area parallel to force






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






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






27. Soft - ductile






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






29. Produces; harder - stronger and less ductile product






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






31. Mass X gravity X height






32. Vertical






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






34. 1%<X<2% carbon. more cementite - used for files






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






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






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






38. AC to DC






39. 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






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






41. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






42. Elongation of grain flow in direction of rolling






43. 10MHZ






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






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






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






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






48. Good high temp wear - tools






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






50. 1/2Xmass X velocity X velocity