materials engineering
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materials engineering - Leaderboard
materials engineering - Details
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77 questions
| 🇬🇧 | 🇬🇧 |
| NA | NA |
| NA | NA |
| What is the process that addresses relationships between processing materials, structures of materials and properties of materials | Material engineering |
| What is the hardest known material, what element is it made from, and why is it so hard? | Diamond, carbon, has strong IMFs |
| Carbon in equilibrium is... | Graphite |
| Stone was used in the... | Stone age |
| -polymers that soften when heated and regain their form when cooled -acrylic, ABS, PLA | Thermoplastics |
| Modulus of elasticity that describes stiffness and is a very important property of solid materials | Young's modulus |
| Type 1 platic that is commonly used in commercially sold water bottles, soft drink bottes, sports drink bottles and condiment bottles | PET (polyethylene terephthalate) |
| Type 2 plastic that is used is milk and juice bottles, detergent bottles, shampoo bottles, grocery bags, and ceral box liners | PE-HD (polyethylene high density) |
| Type 3 plastic that can be flexible or rigid, and is used for plumbing pipes, clear food packaging, shrink wrap, platic toys, tablecloths, vinyl flooring, and blister pacts | PVC (polyvinyl chloride) |
| Type 4 plastic that can be used for dry bags, bread bags, newspaper bags, and paper milk cartons | PE-LD (polyethylene low density) |
| Type 5 plastic that is used to make yogurt containers, furniture luggage, and winter clothing insulation | PP (polypropylene) |
| NA | NA |
| Used to decompose ores and to "drive off" other elements so that only the metal remains | Reducing agent |
| Benefits of aluminum | Low weight, high strength, good formability, high corrosion resistance |
| What are the main energy sources that are used to power smelting | Coal, hydro, natural gas, and nuclear |
| Melt metals to ---- C for efficient smelting, ---- C for excellent smelting and ---- C for amazing smelting | 1200, 1300, 1500 |
| In a crystal, all atoms are arranged in .... | A regular grid pattern (lattice) |
| What characteristic of non dense and random packed structures causes it to have higher energies | Vibration of atoms |
| A = b ≠ c α = β = γ = 90 | Tetragonal |
| A ≠ b ≠ c α = β = γ = 90 | Orthohombic |
| On it's side a = b = c α = β = γ ≠ 90 | Rhombohedral |
| A = b ≠ c α = β = 90 γ = 120 | Hexagonal |
| A ≠ b ≠ c α = γ = 90 ≠ β | Monoclinic |
| A ≠ b ≠ c α ≠ β ≠ γ | Triclinic |
| 6 face atoms at 1/2 each 8 corner atoms at 1/8 each 4 atoms coordination number : 12 | FCC ( face centered cubic) |
| 1 center atom counts for 1 8 corner atoms at 1/8 each 2 atoms coordination number: 8 | BCC (body centered cubic) |
| 12 corner atoms at 1/6 each 2 face atoms at 1/2 each 3 internal atoms for 1 each 6 atoms coordination number: 12 | HCP (hexagonal close packed) |
| Number of nearest neighbor atoms surrounding an atom or ion | Coordination number |
| Packing efficiency in a crystal structure that is occupied by constituent particles | Atomic packing factor |
| Apf of bcc | 0.68 |
| Apf of fcc | 0.74 |
| Apf of hcp | 0.74 |
| Indicated with parenthesis and based on reciprocal of the intersection of plane with cell axes | Planes |
| What is indicated by <> | Families |
| Directions and planes are indicated by... | Miller indices |
| Stress/strain or the slope of a stress/strain curve | Young's modulus |
| The highest point of a stress/strain curve | Ultimate strength |