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. One of the two different types of termination in the polymerization process. during this type of termination - the free radicals from two different polymer chains join to end the propogation process






3. Atoms attached to the polymer backbone.






4. Conformation in which the largest substituents are offset by 180






5. 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






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






7. Polymers that can stretch by 200% or more and still return to their original length when released; polyurethatnes and the aliphatic thermosets(rubbers)






8. Polymer that is made up a single repeat unit






9. Primary raw material for most polymers






10. First step in the process of polymerization - during which a free radical is formed






11. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability






12. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret






13. 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






14. Molecule containing a highly reactive unpaired electron






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






16. 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






17. Conformation that occurs when the largest substituent in a molecule are offset by 60






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






19. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads






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






21. Polymers that contain amide (- N-) groups in the chain






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






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






24. Low- molecular- weight building blocks repeated in the polymer chain






25. Circular - stationary block with small holes through which molten polymer can flow to take the shape of a fiber






26. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air






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






28. 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






29. Additives that improve a polymer's resistance to variable that cause bonds to rupture - such as heat and light






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






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






32. Second- order thermodynamic transition in which the onset of large scale chain mobility occures in polymers. Bellow Tg the polymer is glasslike and brittle. above Tg the polymer becomes rubbery and flexible






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






34. Part of the extrusion apparatus that contains a heated screw which is used to melt the polymer and the polymer forward into the next chamber






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






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






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






38. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed






39. Part of the polymer processing apparatus through which the polymer is pushed - causing the polymer to form a simple shape - such as a rod or tube






40. Number of bonds a molecule has formed






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






42. Molecules added to a polymer to enhance or alter specific properties or molecules added to concrete for purposed other than altering a specific property






43. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings






44. Simple polymeric material produced as pellets in large quantities






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






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






47. Double bounded organic molecule used to begin addition polymerization






48. Last step in the polymerization process - which occurs when the free radical of a polymer chain joins the free radical on an end group






49. 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






50. 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