Test your basic knowledge |

Modern Material Science And Engineering 2

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. Process used to make thermoset fibers by performing the polymerization reacting in a solbent as the material flows through a spinneret and into a quenching bath






2. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer






3. Number of bonds a molecule has formed






4. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret






5. Relative configuration of adjecent asymmetric carbons






6. Simple polymeric material produced as pellets in large quantities






7. Number of repeat/structural units in a polymer chain






8. Polymers comprised of two or more different monomers that attach to the chain in long runs of one type of monomer - followed by another monomer AAAAAAAAAAAAABBBBBBBBBBBBBBBBBBAAAAAAAA






9. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end






10. Polymer made up of two of more differenet monomers covalently bonded together






11. Formation of a plymer that occurs when two potentially reactive end groups on a polymer react to form a new covalent bond between the polymer chains. this reaction also forms a biproduct - usually water






12. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.






13. Specified weight of a polymer that is injected into the mold at the end of the barrel during the injection molding process






14. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern






15. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer






16. Coloring agents that do not dissolve into the polymer






17. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings






18. Molecule containing a highly reactive unpaired electron






19. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit






20. Double bounded organic molecule used to begin addition polymerization






21. Primary raw material for most polymers






22. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device






23. Term used to represent the average molecular weight of a sample containing a wide range of polymer chain lengths. this term is used to avoid confusion between the number average and the weight molecular average weight






24. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties






25. One method of expressing the molecular weight of sample of polymers with averaging based on weight; this method is more useful when large molecules in the sample dominate the behavior






26. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color






27. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit






28. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets






29. Additives that cause swelling - which allows the polymer chains to slide past one another more easily - making the polymer softer and more pliable. also used to decrease the viscosity of cement paste to make it easier to flow






30. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination






31. All issues related to bonding in polymers including primary and secondary bonding - branching - formations of networks - and end groups






32. Specific arrangements of atoms that cause organic compounds to behave in predictable ways






33. Arrangement of the largest substituents where the substituets are offset by 120






34. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion






35. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain






36. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants






37. Broad category of polymers that includes polymers containing urethane linkages






38. Polymer that is made up a single repeat unit






39. Long chain polymers that contain at least 85% of an ester of a substituted aromatic carboxylic acid. these fibers are strong and can dyed or made transpared






40. An acid and an alcohol






41. Carbon atom capable of multiple configurations due to four different substituents






42. Formation of a polymer that occurs when two potentially reactive end groups on a polymer react to form a new covalent bond between the polymer chain. this reaction also forms a byproduct - which is typically water






43. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds






44. Polymers with low melting poins due to the lack of covalent bonding between adjacent chains. such polymers can be repeatedly melted and re- formed






45. Covalently bonded chains of molecules with small monomer units repeated from end to end






46. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel






47. Configuration of a substituent in a polymer - in which the substituent is located on the same side of the polymer chain in all repeating units






48. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains






49. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties






50. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants