1. Materials are characterized by: a. Macroscopic properties b. Microstructure c
ID: 892180 • Letter: 1
Question
1. Materials are characterized by:
a. Macroscopic properties b. Microstructure c. Atomic level composition d. All of the above
2. Atoms are:
a. Discrete units of matter b. An abstract concept c. Found in fractional units d. Lattice points
3. A typical atomic radii is roughly:
a. 1 centimeter b. 1 nanometer c. 1 picometer d. 1 angstrom
4. All cubic crystal lattices have:
a. Equal edge lengths b. 90 angles between edges c. Both a. & b. d. Atoms at each corner
5. Body centered cubic metals have:
a. Close packed directions b. Close packed planes c. Both a. & b. d. Neither a. or b.
6. Body centered cubic metals have:
a. Close packed directions b. Close packed planes c. Both a. & b. d. Neither a. or b.
7. A crystal lattice is an:
a. Idealized representation of sites in a real crystal b. Exact crystal representation c. Both a. & b.
d. Neither a. or b.
8. Defects in a real crystal:
a. Might be at lattice sites b. Might be found within interstices c. Improve properties d. Decrease properties e. Require extensive characterization as they may involve a., b., c., & d.
May i get he[ to answer those questions ?
Thank you !
Explanation / Answer
1. Materials are characterized by:
d. All of the above
2. Atoms are:
d. Lattice points
3. A typical atomic radii is roughly:
d. 1 angstrom
4. All cubic crystal lattices have:
a. Equal edge lengths b. 90 angles between edges c. Both a. & b.
5. Body centered cubic metals have:
d. Neither a. or b.
6. Body centered cubic metals have:
a. Close packed directions b. Close packed planes c. Both a. & b.
7. A crystal lattice is an:
c. Both a. & b.
8. Defects in a real crystal:
e. Require extensive characterization as they may involve a., b., c., & d.
note : all are answer (bold)
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