he ra e volume of atoms present in a crystal (unit cell)to the volume of the unit cell 3 The implies that a material plastically deforms or flows very slowly under load as a 14.The term is used to describe how many atoms are touching each other in a group of coordinated 15.Uncharged particles in the nucleus with a mass nearly equal to the proton's mass. III.Choose the correct answer to the following questions(35points) 1.The method used during design and manufacturing to determine the impact of a product or system on the environment. A)Life cycle analysis B) Life cycle inventory C)Systems approach D) Characterization Which of the following statements is NOT true about the atom? A)It has 6 protons in its nucleus. It has 12 neutrons Its nu cleus It has 6 ons orbi ing the nucleus It to study the crystal structures of solids by measuring the angles of terial specimens A) al m XRDY D)Differential ther mal analysis (DTA) 4.A field that involves the A)Engineering Materials Technology B Materials Engineering C)Materials Science D)Materials Science And Engineering 5.The results obtained from fatigue tests are recorded on semilog or log-log paper to produce diagrams. A)o-8 B)S-N C)t-Y D)T-0 6.Which of the following is the type of bond holding Na and CI ions in NaCl? A)lonic bond B) Covalent bond Hydrogen bond D Metallic bond What factor in materials selection usually dominates the final choice? PpF文件使用”pdfFactory Pro”试用版第建，fineprint.com.cn 第 2 页 the entire material, forming a regular gridlike lattice or pattern. 11. The ratio of the volume of atoms present in a crystal (unit cell) to the volume of the unit cell. 12. The ratio of ultimate strength to allowable stress. 13. The term implies that a material plastically deforms or flows very slowly under load as a function of time. 14. The term is used to describe how many atoms are touching each other in a group of coordinated atoms. 15. Uncharged particles in the nucleus with a mass nearly equal to the proton’s mass. III. Choose the correct answer to the following questions (35points) 1. The method used during design and manufacturing to determine the impact of a product or system on the environment. A) Life cycle analysis B) Life cycle inventory C) Systems approach D) Characterization 2. Which of the following statements is NOT true about the atom? A) It has 6 protons in its nucleus. B) It has 12 neutrons in its nucleus. C) It has 6 electrons orbiting the nucleus D) Its atomic number is 6 3. A useful tool that is used to study the crystal structures of solids by measuring the angles of electrons glancing off material specimens. A) Electron microscope B) Optical microscope C) X-ray diffraction (XRD) D) Differential thermal analysis (DTA) 4. A field that involves the generation and application of knowledge relating to the composition, structure and processing of materials to their properties and use. A) Engineering Materials Technology B) Materials Engineering C) Materials Science D) Materials Science And Engineering 5. The results obtained from fatigue tests are recorded on semilog or log-log paper to produce ______ diagrams. A) s-e B) s-N C) t-g D) T-q 6. Which of the following is the type of bond holding Na + and Cl - ions in NaCl? A) Ionic bond B) Covalent bond C) Hydrogen bond D) Metallic bond 7. What factor in materials selection usually dominates the final choice? A) Recyclability B) Cost C) Processibility D) Properties of materials PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn