front 1 what is not a mechanical property? | back 1 thermal conductivity |
front 2 an amorphous crystal structure has short-range order only. | back 2 true |
front 3 metals are made up of mostly what? | back 3 metallic elements |
front 4 the same material that is processed differently will have the same properties | back 4 false |
front 5 metals are usually what | back 5 crystalline |
front 6 are metals usually single or multi grain? | back 6 multi grain |
front 7 glasses are usually | back 7 amorphous |
front 8 are glasses mutli grain, single grain, or neither? | back 8 they are neither |
front 9 ceramics are usually what | back 9 crystalline or a mix of amorphous and crystalline regions |
front 10 are cermaics single or multi grain? | back 10 multi grain |
front 11 thermoplastics are usually what? | back 11 amorphous or a mix of amorphous and crystalline regions |
front 12 thermosets are usually what? | back 12 amorphous |
front 13 polymers are made up of mostly what? | back 13 nonmetallic elements |
front 14 ceramics are mostly made up of what? | back 14 a mix of metallic and nonmetallic elements |
front 15 Semiconductors are usually what? | back 15 crystalline |
front 16 are semiconductors multi grain or single grain? | back 16 single grain |
front 17 what material type has the highest density? | back 17 metals |
front 18 which material type is least prone to corrosion? | back 18 ceramics |
front 19 Which material type typically has both high strength and ductility? | back 19 metals |
front 20 which material type is the most limited in the temperature that it can operate(high temp)? | back 20 polymers |
front 21 which material type usually has the lowest density? | back 21 polymers |
front 22 which material type has the highest stiffness? | back 22 cermamics |
front 23 which material type has the lowest stiffness? | back 23 polymers |
front 24 which material has the highest thermal conductivity? | back 24 metals |
front 25 which material has the highest electrical conductivity? | back 25 metals |
front 26 which material type can be operated at the highest temperature? | back 26 ceramics |
front 27 which form of SiO2 is transparent? | back 27 amorphous SiO2 |
front 28 which form of carbon is the hardest? | back 28 diamond |
front 29 which polymer type is easiest to recycle? | back 29 thermoplastics |
front 30 which polymer is the most brittle? | back 30 thermosets |
front 31 which type of polymer can deform the most without breaking? | back 31 elastomers |
front 32 what is the most common semiconductor? | back 32 silicon |
front 33 the equilibrium spacing between atoms in a solid is the same at all temperatures. | back 33 false |
front 34 it takes a force to move atoms in solids away from their equilibrium. | back 34 true |
front 35 are primary bonds stronger or weaker than secondary bonds? | back 35 stronger |
front 36 the primary bonding type that involves the transfer of electrons from positive to negative ions? | back 36 ionic bonding |
front 37 the primary bonding type that involves sharing of electrons that are not free to move is what? | back 37 covalent bonding |
front 38 the type of bonding that occurs where valence electrons flow freely is what? | back 38 metallic bonding |
front 39 the type of bonding that occurs mostly in metals is what? | back 39 metallic bonding |
front 40 the type of bonding that occurs mostly in ceramics is what? | back 40 covalent (ionic or mix of the two) |
front 41 the type of bonding that occurs mostly in semiconductors is what? | back 41 covalent bonding |
front 42 the type of bonding that occurs mostly in thermoplastics is what? | back 42 covalent and secondary bonding |
front 43 the strength of an elastomer can be increased by? | back 43 increasing the number of covalent bonds |
front 44 are covalent bonds directional? | back 44 no |
front 45 If the bonding energy for MgO is 1000 and the bonding energy for tungsten is 849, what would have the higher melting point? | back 45 MgO |
front 46 If the bonding energy for MgO is 1000 and the bonding energy for tungsten is 849, what would have the higher stiffness? | back 46 MgO |
front 47 the same compound can form a crystalline or an amorphous structure. | back 47 true |
front 48 atoms in solids are not at their equilibrium position near defects? | back 48 true |
front 49 the number of vacancies in a solid decreases as temperature increase. | back 49 false |
front 50 a interstitial solid solution is more likely to occur when the minor element atom is small relative to the major element> | back 50 true |
front 51 a substitutional solid solution is more likely to occur when the minor element (solute) is small relative to the major element (solvent). | back 51 false |
front 52 defects affect the properties of materials. | back 52 true |
front 53 Permanent deformation to a material when loaded is called what? | back 53 plastic deformation |
front 54 if plastic deformation is difficult, ductility is lower. | back 54 true |
front 55 the metal crystal structure with the highest ductility is. | back 55 FCC- face centered cubic |
front 56 the metal crystal structure with the lowest ductility is. | back 56 HCP - hexagonal close pack |
front 57 Dislocation slip is easiest in which metallic crystal structure? | back 57 FCC - face centered cubic |
front 58 is dislocation slip easier in ceramics? | back 58 no |
front 59 which is stronger pure copper or copper with 10weight% zinc? | back 59 copper with 10 weight% zinc |
front 60 which is stronger copper that has not been plastically deformed or plastically deformed copper? | back 60 plastically deformed copper |
front 61 which is stronger pure copper with a small grain size or a large grain size? | back 61 pure copper with the small grain size |
front 62 which is stronger than a single-phase aluminum alloy or an aluminum alloy with precipitates. | back 62 the single phase aluminum alloy |
front 63 the number of vacancies increases with increasing temperature. | back 63 true |
front 64 dislocation slip occurs along random direction in a crystal. | back 64 false |
front 65 plastic deformation occurs by bonds breaking and reforming? | back 65 true |
front 66 will a thermoplastic rope that has been formed with plastic deformation be stronger if it has been deformed? | back 66 with plastic deformation |