front 1 True or false. thermoplastic have some ductility. | back 1 true |
front 2 True or false. thermosets have some ductiltiy | back 2 false |
front 3 Ture or false. Materials with the exact same composition will have the same properties, even if the processing steps to produce them are different. | back 3 false |
front 4 Is a Zn a cermaic | back 4 NO |
front 5 What material has compounds made up of both metallic and non-metallic elements like tungsten carbide. | back 5 ceramic |
front 6 What is not a characteristic for ceramic? | back 6 good ductility and formability |
front 7 What material has the highest density? | back 7 metals |
front 8 What material has the highest stiffness? | back 8 ceramics |
front 9 Which material is the best for high temperature applications? | back 9 ceramics |
front 10 True or false. do metals have some ductility | back 10 true |
front 11 True or false. do ceramics have some ductility | back 11 false |
front 12 True or false. do elastomers have some ductility | back 12 true |
front 13 Which is a polymer? silicon, silica, or silicone | back 13 silicone |
front 14 What polymer softens repeatably on heating? | back 14 thermoplastic polymers |
front 15 What polymer type is the easiest to recycle | back 15 thermoplastic polymers |
front 16 True or false. syntactic foams are polymer matrix composites reinforced with hollow spheres | back 16 true |
front 17 true or false. aggregates make concrete more expensive | back 17 false |
front 18 Will a greater or smaller fraction of reinforcing fibers increase strength in fiber reinforced composites. | back 18 greater fraction |
front 19 Will fibers parallel or perpendicular to the applied load have the highest strength? | back 19 parallel |
front 20 Will shorter/fatter or longer/thinner fibers increase the strength in fiber reinforced composites? | back 20 long/thin fibers |
front 21 Would a linear or branched thermoplastic have a higher strength if all other aspects are the same? | back 21 branched |
front 22 Would a thermoplastic with a higher or lower average atomic weight have a higher strength? | back 22 higher average atomic weight |
front 23 Would a thermoplastic with a higher or lower degree of crystallinity have a higher strength? | back 23 high degree |
front 24 Would a thermoplastic with complex or simple side groups have a higher strength? | back 24 complex side groups |
front 25 Would an elastomer with a low or high number of crosslinks have a higher strength? | back 25 high number of crosslinks |
front 26 Which polymer has the most primary bonds? | back 26 thermoset |
front 27 Which would have a higher strength, a ceramic with high or low porosity level? | back 27 lower porosity |
front 28 Which would have a higher strength, a ceramic with a smaller or larger grain size? | back 28 small grain size |
front 29 What is the toughest ceramic? | back 29 zirconia (ZrO2) |
front 30 True or false. silica is a network former in glass. | back 30 true |
front 31 True or false. most steel is produced by sand casting | back 31 false. Continuous casting |
front 32 What type of cast iron will be the hardest? | back 32 white iron |
front 33 Which type of cast iron conducts heat the best? | back 33 gray iron |
front 34 Which type of cast iron has the best machinability? | back 34 gray iron |
front 35 By weight, the most used metal alloy is... | back 35 iron/steel |
front 36 True or false. carbon steels are more expensive than alloy steels. | back 36 false |
front 37 True or false. BBC steel is magnetic | back 37 true |
front 38 True or false. aluminum has a lower density than steel | back 38 true |
front 39 True or false. aluminum has a higher stiffness than steel | back 39 false |
front 40 Ture or false. it takes less energy to make aluminum from ore than it takes to make iron from ore. | back 40 falseee |
front 41 True or false. With the exception of silver, copper is a metal with the highest conductivity. | back 41 true |
front 42 True or false. A glaze helps stop staining of ceramics. | back 42 true |
front 43 True or false. Vitrification is the partial melting of a ceramic during sintering that, when cooked, forms a glass. | back 43 true |
front 44 True or false. Vitrification reduces the strength of cermaics | back 44 false |
front 45 True or false. Transformation toughened zirconia is tough because it is very hard. | back 45 false |
front 46 What material is used the most (by weight)? | back 46 Cement and concrete |
front 47 True or false. The most advanced ceramics are melted to form their parts. | back 47 false |
front 48 What is not true for a glazed ceramic? | back 48 the glaze closes up pores in the interior of the part |
front 49 True or false. Glasses are shiny because they are crystalline. | back 49 false |
front 50 True or false. Tempered glass is stronger than glass that is not tempered. | back 50 true |
front 51 True or false. The density of steel is significantly lower than that of aluminum. | back 51 false |
front 52 How much carbon is in a 1045 steel? | back 52 .45 wt% |
front 53 What element makes steel stainless? | back 53 chromium |
front 54 True or false. The recycling of metal reduces its cost. | back 54 true |
front 55 What is the most commonly used element in polymers? | back 55 carbon |
front 56 Do you expect the strength of polymers to increase or decrease after thermoplastic polymer fibers are pulled plastically to lengthen the fibers? | back 56 increase |
front 57 True or false. By weight, does the usage of thermoset polymers exceeds that of thermoplastic polymers? | back 57 false |
front 58 What method is the most common processing method for plastic production? | back 58 injection molding |
front 59 The difference between a compostite and an alloy is what? | back 59 Composites are materials made up of two components that retain their original character. |
front 60 True or false. the bonding between matrix and reinforcing phases in fiber reinforced polymer composites affects ductility. | back 60 true |
front 61 What is true for a dispersion strengthened composite composite but not for a precipitation-hardened metal alloy. | back 61 composites can operate at higher temperatures |
front 62 What is the most common matrix for fiber reinforced composites? | back 62 thermosetting polymer |
front 63 There is a limit to the amount of fiber reinforced tat can be added to a fiber-reinforced polymer because... | back 63 the fibers need to be fully coated with the martix to achieve optiumum properties |
front 64 Which fiber type is stronger but not as stiff? | back 64 kevlar fiber |
front 65 True or false. bag molding of composites gives better properties than simple hand lay-ups. | back 65 true |
front 66 True or false. a thermoset matrix in a fiber reinforced composite is easier to process. | back 66 false |
front 67 What is not a typical property of a metal? | back 67 poor conductor of heat |
front 68 What has more carbon, steel or cast iron? | back 68 cast iron |
front 69 True or false. the corrosion rate of metals increases at increased temperatures. | back 69 true |
front 70 True or false. the corrosion rate of metals decreases when the metal is under stress. | back 70 false |
front 71 What element makes stainless steel corrosion resistance? | back 71 chromium |
front 72 True or false. window glass is made by flat rolling. | back 72 false The glass is floated on molten tin |
front 73 What material types can degrade in sunlight? | back 73 polymers?? |