MFGE 337.HW#7.GlassCeramPowd.W16 (1)

MFGE 337.HW#7.GlassCeramPowd.W16 (1) - Assignment#7 MFGE...

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Assignment #7 Glasses, Ceramics and Powder Processing (70 pts total) MFGE 337 Materials & Manufacturing Processes Multiple Choice (1 pt for each answer = 21 pts): 7.1 Which one of the following is the most common element in the earth's crust: (a) aluminum, (b) calcium, (c) iron, (d) oxygen, or (e) silicon? 7.2 Glass products are based primarily on which one of the following minerals: (a) alumina, (b) corundum, (c) feldspar, (d) kaolinite, or (e) silica? 7.3 Which of the following contains significant amounts of aluminum oxide (three correct answers): (a) alumina, (b) bauxite, (c) corundum, (d) feldspar, (e) kaolinite, (f) quartz, (g) sandstone, and (h) silica? 7.4 Glass ceramics are polycrystalline ceramic structures that have been transformed into the glassy state: (a) true, or (b) false? 7.5 Which one of the following materials is closest to diamond in hardness: (a) aluminum oxide, (b) carbon dioxide, (c) cubic boron nitride, (d) silicon dioxide, or (e) tungsten carbide? 7.6 Properties and characteristics of the glass-ceramics include which of the following (two best answers): (a) efficiency in processing, (b) electrical conductor, (c) high thermal expansion, or (d) strong, relative to other ceramics? 12.1 Which one of the following terms refers to the glassy state of a material? (a) crystalline, (b) devitrified, (c) polycrystalline, (d) vitiated, or (e) vitreous. 12.2 The charge in glassworking is which one of the following: (a) the duration of the
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