Test your basic knowledge |

Modern Material Science And Engineering

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. Large - artificially produced monocrystals






2. Regions of a material in which atoms are arranged in a regular pattern






3. The first level of the structure of materials - describing the atoms present






4. A flaw in the structure of a material that occurs at a single site in the lattice - such as vacancies - substitutions - and interstitial defects






5. A mathematical representation of the magnitude and direction of distortions in a lattice caused by dislocations






6. The ares of a material that separate different crystallite regions






7. Large scale lattice defects that occur from alterations to the structure of the lattice itself






8. The interaction of waves






9. The increase in amplitude resulting from two or more waves interacting in phase






10. A numerical system used to represent specifics planes in a lattice






11. The edge lengths and angels of a unit cell; describes the sizes and shapes of the lattices






12. The filling of a vancacy in the partial plane of an edge dislocation by an adjacent atom resulting in a shrinking of the crystal in the direction perpendicular to the partial plane






13. A specific set of h






14. Crystallite materials with sizes of nanometers in length






15. The process of forming small aligned clusters of atoms that serve as the framework for crystal growth






16. Provides a framework for the new atoms to follow in constructing a monocrystal






17. Formula that relates interplaner spacing in a lattice to constructive interference of diffracted X- rays


18. Point defects that result when an atom in the lattice is replaced with an atom of a different element






19. The movement of dislocations through a crystal - caused when the material is placed under shear stress






20. An electron microscope that passes the electron beam through the sample and used the difference in the beam scattering and diffraction to view the object






21. The direction that dislocation moves in






22. Point defects that occur when an atom occupies a space that is normally vacant






23. The size - shape - and arrangement of atoms in a three- dimensional lattice






24. Composed of both the slip plane and the slip directions






25. A hypothetical structure accounting for irregularities in the boundaries between crystallites






26. The systematic reduction in intensity of diffraction peaks from specific lattice planes






27. The equations used to determine the critical resolved shear stress in a material


28. A nullification caused by two waves interacting out of phase






29. Generalized equation used to predict the temperature dependence of various physics properties






30. A means of relating the amount of spreading in a X- ray diffractogram to the thickness of the crystallites in the sample






31. Lattice defects caused by the addition of a partial plane into an existing lattice structure






32. A point defect that occurs in ceramics when both a cation and an anion are missing from a lattice






33. The density a material would have if it consisted of a single perfect lattice






34. The use of light to magnify objects up to 2000 times






35. Point defects that result from the absence of an atom at a particular site






36. One of the bravais lattices that has one atom in each of the 8 corners of the unit cell and one atom on each face of the unit cell






37. The distance between repeated planes in a lattice






38. Microscopes that focus a high- energy beam of electrons at the source and collect the back- scattered beam of these electrons






39. The presence of both screw and edge dislocations separated by a distance in the same lattice






40. One of the bravais lattice that contains one atom in each corner of the unit cell as well as one atom in the center of the unit cell






41. The first set of panes in a material to experience slip under an applied stress






42. The second step in the formation of crystallites - which is dependent on temperature and can be described using the arrhenius equation






43. Materials whose order extends only to nearest neighbor atoms






44. The second level of the structure of materials - describing how the atoms are positioned in relation to one another as well and the type of bonding between them






45. The line extending along the extra partial plane of atoms in an edge dislocation






46. New planes formed after the material has undergone slip






47. For a slip to occur - a sufficient amount of stress must be applied to permanently deform the material






48. A point defect found in ceramic materials that occurs when a cation diffuses onto an interstitial site on the lattice






49. Correlation used to estimate the yield strength of a given material - based on grain size






50. Mechanism by which dislocations move in directions that are perpendicular to the slip plane