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Intro To Engineering Materials

Subject : engineering
Instructions:
  • Answer 43 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. Material in which the atoms are situated in a repeating or periodic array over large atomic distances.






2. Deformation that is non - permanent and totally recovered upon release of applied stress.






3. Metals as well as nonmetals that have more than one crystal structure.






4. The capacity of a material to absorb energy when it is elastically deformed.






5. 1.38e-23

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6. The stress required to produce a very slight yet specified amount of plastic strain.






7. Crystal structure with a hexagonal unit cell. Coordination # = 12. APF = 0.74.






8. The energy required to separate two atoms that are chemically bonded to each other.






9. The measure of a material's resistance to deformation by surface indentation or by abrasion.






10. Crystal structure with atoms located at each of the corners and the centers of all the cube faces. Coordination # = 12. APF = 0.74.






11. The diffusion condition for which there is some net accumulation or depletion of diffusing species.






12. The curve that results when the concentration of a chemical species is plotted versus position in a material.






13. Crystal structure with atoms located at all eight corners and a single atom at the cube center. Coordination # = 8. APF = 0.68.






14. A stress used for design purposes; for ductile metals - it is the yield strength divided by a factor of safety.






15. Deformation that is permanent or nonrecoverable after release of the applied stress.






16. The diffusion condition for which there is no net accumulation or depletion of diffusing species.






17. The change in gauge length of a specimen divided by its original gauge length.






18. The sum of the sphere volumes of all atoms within a unit cell divided by the unit cell volume.






19. Atomic migration from interstitial site to interstitial site. Typically happens more frequently than vacancy diffusion.






20. The instantaneous load applied to a specimen divided by its cross - sectional area before any deformation.






21. Atomic migration from a normal lattice position to an adjacent vacant lattice site or vacancy.






22. A measure of a material's ability to undergo appreciable plastic deformation before fracture; may be expressed as percent elongation (%EL) or percent reduction area (%RA) from a tensile test.






23. Material transport by atomic motion.






24. The instantaneous applied load divided by the instantaneous cross - sectional area of a specimen.






25. A three- dimensional array of points coinciding with atom positions.






26. Prisms having three sets of parallel faces.






27. Atomic migration in pure metals.






28. A linear defect associated with the lattice distortion created when normally parallel planes are joined together to form a helical ramp.






29. Time- dependent elastic deformation.






30. The ratio of stress to strain when deformation is totally elastic; also a measure of the stiffness of a material.






31. The slope of the concentration profile at a specific position.






32. The rate of diffusion or rate of mass transfer.






33. The manner in which atoms - ions - or molecules are spatially arranged.






34. The natural logarithm of the ratio of instantaneous gauge length to original guage length of a specimen being deformed by a uniaxial force.






35. Product of the calculated stress level and a design factor.






36. The maximum engineering stress - in tension - that may be sustained without fracture.






37. Linear defect associated with the lattice distortion produced in the vicinity of the end of an extra half- plane of atoms within a crystal.






38. Exhibiting different values of a property in different crystallographic directions.






39. The process whereby atoms of one metal diffuse into another.






40. A homogeneous crystalline phase that contains two or more chemical species.






41. Having identical values of a property in all crystallographic directions.






42. The total area under the material's tensile engineering stress - strain curve taken to fracture.






43. The onset of plastic deformation.