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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. Horizontal






3. Vertical






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






5. Good wear - case hardening. ball bearings






6. 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.






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






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






9. Hard - brittle






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






11. 100khz






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






13. MA=VR






14. 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.






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






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






17. 100GHZ+






18. 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






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






20. Area parallel to force






21. AC to DC






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






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






24. Load/effort






25. Load/area






26. 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






27. Usually used together - strengthening and toughness






28. Produces; harder - stronger and less ductile product






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






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






31. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear






32. Ma/vr






33. Elongation of grain flow in direction of rolling






34. Area load piston/area of effort piston






35. 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






36. 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






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






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






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






40. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures






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






42. 1GHZ






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






44. 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






45. 1/4 of the wavelength (higher better)






46. Mass X gravity X height






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






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






49. Good high temp wear - tools






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