8.Which stage of the materials cycle is the most difficult for manufacturers to develop a full materials cycle? A)Extracting raw materials B Manufacturing engineered materials Service of products and systems D) Recycling/disposal materials 9.How many space lattices(Bravais lattices)can atoms form in seven crystal systems? A) B) is a mea e f eat flow throuh a material.It relates heat fow(heat R) C)Therma I conductivity D)Coefficient of the Which concept of the materials cvcle has been LEAST AFFECTED by recent trends? A)Concern for the entire cycle that includes effects of harmful by-products and unrecycled old products B)Ability to design materials to meet ever-increasing demands of technology rather than use"off-the shelf materials. C)Need for a more highly educated workforce to support new manufacturing techniques. D)Desire to achieve the maximum properties from any given materials. 12. crystal system has mutually perpendicular axes (a=B=y=90)but unequal lattice parameters,among which the z-intercept is larger than the x-or y-intercepts(c>a=b). A)Cubic B Hexagonal Monoclinic Tetragonal represents the energy per unit volume of a material required to produce fracture under static conditions 01 elasticity 0 Modulus 14.The key cribing covalent bonding is A) rring swapping Swarming 15.Vickers hardness numbers are a measure of the size of the penetration made by with different loads A)10-mm steel ball B tungsten carbide sphere C) diamond pyramid indentor D) diamond cone indentor 16. involves transforming gases,liquids,and solid elements by chemical and physical means, where atoms and molecules are combined to form solid materials. e A) ynthes D Wroughting PF文件使用"pdfFactory Pro'试用版築键fineprint..con.cn第 3 页 8. Which stage of the materials cycle is the most difficult for manufacturers to develop a full materials cycle? A) Extracting raw materials B) Manufacturing engineered materials C) Service of products and systems D) Recycling/disposal materials 9. How many space lattices (Bravais lattices) can atoms form in seven crystal systems? A) 3 B) 4 C) 8 D) 14 10. ____________ is a measure of heat flow through a material. It relates heat flow (the flow of heat energy per unit area, per unit time) to the temperature gradient, causing the heat to flow. A) Heat capacity B) Specific heat C) Thermal conductivity D) Coefficient of thermal expansion 11. Which concept of the materials cycle has been LEAST AFFECTED by recent trends? A) Concern for the entire cycle that includes effects of harmful by-products and unrecycled old products B) Ability to design materials to meet ever-increasing demands of technology rather than use “off-the shelf” materials. C) Need for a more highly educated workforce to support new manufacturing techniques. D) Desire to achieve the maximum properties from any given materials. 12. ___________ crystal system has mutually perpendicular axes (a=b=g=90°) but unequal lattice parameters, among which the z-intercept is larger than the x- or y- intercepts (c>a=b). A) Cubic B) Hexagonal C) Monoclinic D) Tetragonal 13. _____________represents the energy per unit volume of a material required to produce fracture under static conditions. A) Modulus of elasticity B) Modulus of toughness C) Modulus of resilience D) Modulus of rigidity 14. The key word in describing covalent bonding is ___________. A) Transferring B) Sharing C) Swapping D) Swarming 15. Vickers hardness numbers are a measure of the size of the penetration made by ______ with different loads. A) 10-mm steel ball B) tungsten carbide sphere C) diamond pyramid indentor D) diamond cone indentor 16. involves transforming gases, liquids, and solid elements by chemical and physical means, where atoms and molecules are combined to form solid materials. A) Analysis B) Processing C) Synthesis D) Wroughting PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn