16.The term is used to describe how many atoms are touching each other in a group of coordinated and analysis term thaalrructural propertes. microstructure as well of a material' more on structure and 18 The te of at least 50%ir 19.The te hat includesiron an n that is d t repeating the basic vstal.which resulted from nsions electron IL.Choose the correct answer(s)to the followin estions (25points) 1.Which of the following statement about the diffusion of atoms,molecules or ions is NOT correct? A)The rate of diffusion will decrease with an increase in temperature. B) A lattice structure that contains loosely packed atoms(less dense)will offer greater resistance to diffusing atoms than one whose structure contains tightly packed atoms. The stronger the bonding forces between the atoms the more difficult for the atoms to diffuse. D) Smaller permeating atoms stand better chance of diffusion through a structure of larger atoms 2. A field that deals with developing.preparing.modifying.and applying materials to a specific ng Materials Technology Mate Engineering e And Engincering Which of the followin statement about hydrogen bonding is NOT correct? A)sv metrical charge distrib on static electrical at ction be an attraction force bet en positive and negative char s with site D)the strongest of the secondary bonding 4 Which statement is MOST TRUE about materials technology? A)Existing specifications and laws make it easy to introduce new materials in fields such as building construction and commercial aircraft. B)Materials Science and engineering usually follows the lead of developments in other technologies Industry and the consumer are quick to accept new materials and processes innovations D) Devel opments in materials science and engineering have allowed for innovations in most other technologies. 5. is the maximum stress that can be sustained for a specified number of stress D)Endur nce ratio 6 Which is not an obstacle to acceptance of new engineering materials and processes? A)Time-consuming approach to gain sufficient experience B)Concern for keeping up with one's competition C)Lack of experience by designers and fabricators D)Need for compromise between favorable properties and cost 箱9而 第 2 页 16.The term is used to describe how many atoms are touching each other in a group of coordinated atoms. 17.The term that allows the identification and analysis of unique properties of a material’s microstructure as well as macrostructural properties, which focuses more on structure and composition. 18.The term that includes iron and alloys of at least 50% iron. 19.The term that is used to describe the larger pattern of atoms in a single crystal, which resulted from repeating the basic building block or basic geometric arrangement of atoms in all three dimensions. 20. A particle of matter that carries a positive electrical charge equivalent to the negative charge on an electron. II. Choose the correct answer(s) to the following questions (25points) 1. Which of the following statement about the diffusion of atoms, molecules or ions is NOT correct? A) The rate of diffusion will decrease with an increase in temperature. B) A lattice structure that contains loosely packed atoms (less dense) will offer greater resistance to diffusing atoms than one whose structure contains tightly packed atoms. C) The stronger the bonding forces between the atoms the more difficult for the atoms to diffuse. D) Smaller permeating atoms stand better chance of diffusion through a structure of larger atoms. 2. A field that deals with developing, preparing, modifying, and applying materials to a specific need. A) Engineering Materials Technology B) Materials Engineering C) Materials Science D) Materials Science And Engineering 3. Which of the following statement about hydrogen bonding is NOT correct? A) symmetrical charge distribution B) static electrical attraction between positive and negative charges C) an attraction force between adjacent charges with opposite signs D) the strongest of the secondary bonding 4. Which statement is MOST TRUE about materials technology? A) Existing specifications and laws make it easy to introduce new materials in fields such as building construction and commercial aircraft. B) Materials Science and engineering usually follows the lead of developments in other technologies C) Industry and the consumer are quick to accept new materials and processes innovations D) Developments in materials science and engineering have allowed for innovations in most other technologies. 5. _______________ is the maximum stress that can be sustained for a specified number of stress cycles without fracture. A) Fatigue limit B) Fatigue ratio C) Fatigue strength D) Endurance ratio 6. Which is not an obstacle to acceptance of new engineering materials and processes? A) Time-consuming approach to gain sufficient experience B) Concern for keeping up with one’s competition C) Lack of experience by designers and fabricators D) Need for compromise between favorable properties and cost