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Test your basic knowledge |
Intro To Engineering Materials
Start Test
Study First
Subject
:
engineering
Instructions:
Answer 43 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Metals as well as nonmetals that have more than one crystal structure.
Lattice
Hardness
Unit Cells
Polymorphism
2. Crystal structure with a hexagonal unit cell. Coordination # = 12. APF = 0.74.
Nonsteady- state Diffusion
Ductility
Toughness
Hexagonal Close- packed (HCP)
3. A linear defect associated with the lattice distortion created when normally parallel planes are joined together to form a helical ramp.
Tensile Strength
Vacancy Diffusion
Unit Cells
Screw Dislocation
4. The rate of diffusion or rate of mass transfer.
Body- centered Cubic (BCC)
Polymorphism
Diffusion Flux
Lattice
5. Crystal structure with atoms located at each of the corners and the centers of all the cube faces. Coordination # = 12. APF = 0.74.
Lattice
Yielding
Face- centered Cubic (FCC)
Steady- state Diffusion
6. Prisms having three sets of parallel faces.
Yielding
Modulus of Elasticity
Crystal Structure
Unit Cells
7. Atomic migration in pure metals.
Self- diffusion
True Strain
Interdiffusion
Hardness
8. The ratio of stress to strain when deformation is totally elastic; also a measure of the stiffness of a material.
Interdiffusion
Nonsteady- state Diffusion
Modulus of Elasticity
Resilience
9. The sum of the sphere volumes of all atoms within a unit cell divided by the unit cell volume.
Boltzmann's Constant
Atomic Packing Factor (APF)
Concentration Gradient
True Stress
10. Deformation that is permanent or nonrecoverable after release of the applied stress.
Plastic Deformation
Body- centered Cubic (BCC)
Hexagonal Close- packed (HCP)
Ductility
11. The instantaneous load applied to a specimen divided by its cross - sectional area before any deformation.
Yielding
Engineering Stress
Yield Strength
Anisotropic
12. Atomic migration from interstitial site to interstitial site. Typically happens more frequently than vacancy diffusion.
Concentration Profile
Interstitial Diffusion
Bonding Energy
Screw Dislocation
13. The total area under the material's tensile engineering stress - strain curve taken to fracture.
Toughness
Ductility
Edge Dislocation
Lattice
14. The maximum engineering stress - in tension - that may be sustained without fracture.
Lattice
Nonsteady- state Diffusion
Tensile Strength
Yielding
15. The process whereby atoms of one metal diffuse into another.
Hexagonal Close- packed (HCP)
Anisotropic
Ductility
Interdiffusion
16. The change in gauge length of a specimen divided by its original gauge length.
Body- centered Cubic (BCC)
Boltzmann's Constant
Engineering Strain
Concentration Gradient
17. Having identical values of a property in all crystallographic directions.
Solid Solution
Concentration Gradient
Isotropic
Yielding
18. The diffusion condition for which there is no net accumulation or depletion of diffusing species.
Screw Dislocation
Design Stress
Interstitial Diffusion
Steady- state Diffusion
19. The diffusion condition for which there is some net accumulation or depletion of diffusing species.
Concentration Profile
Engineering Stress
Bonding Energy
Nonsteady- state Diffusion
20. A homogeneous crystalline phase that contains two or more chemical species.
Engineering Strain
True Strain
Elastic Deformation
Solid Solution
21. The manner in which atoms - ions - or molecules are spatially arranged.
Polymorphism
Vacancy Diffusion
Crystal Structure
Bonding Energy
22. The onset of plastic deformation.
Yielding
Engineering Stress
Yield Strength
Boltzmann's Constant
23. The measure of a material's resistance to deformation by surface indentation or by abrasion.
Hexagonal Close- packed (HCP)
Hardness
Ductility
Bonding Energy
24. Crystal structure with atoms located at all eight corners and a single atom at the cube center. Coordination # = 8. APF = 0.68.
Anisotropic
Body- centered Cubic (BCC)
Engineering Stress
True Strain
25. The slope of the concentration profile at a specific position.
Design Stress
Concentration Gradient
Hexagonal Close- packed (HCP)
Anelastic Deformation
26. Deformation that is non - permanent and totally recovered upon release of applied stress.
Polymorphism
Unit Cells
Crystal Structure
Elastic Deformation
27. Atomic migration from a normal lattice position to an adjacent vacant lattice site or vacancy.
Nonsteady- state Diffusion
Vacancy Diffusion
Diffusion
Face- centered Cubic (FCC)
28. Product of the calculated stress level and a design factor.
Edge Dislocation
Body- centered Cubic (BCC)
Yielding
Design Stress
29. Linear defect associated with the lattice distortion produced in the vicinity of the end of an extra half- plane of atoms within a crystal.
Design Stress
Edge Dislocation
Concentration Gradient
Interstitial Diffusion
30. The capacity of a material to absorb energy when it is elastically deformed.
Resilience
Body- centered Cubic (BCC)
Face- centered Cubic (FCC)
Bonding Energy
31. A three- dimensional array of points coinciding with atom positions.
Yielding
Hardness
Lattice
Self- diffusion
32. 1.38e-23
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33. A stress used for design purposes; for ductile metals - it is the yield strength divided by a factor of safety.
Unit Cells
Crystal Structure
Lattice
Safe Stress
34. Material in which the atoms are situated in a repeating or periodic array over large atomic distances.
Design Stress
Concentration Gradient
Elastic Deformation
Crystalline Solid
35. The energy required to separate two atoms that are chemically bonded to each other.
Screw Dislocation
Nonsteady- state Diffusion
Anisotropic
Bonding Energy
36. Time- dependent elastic deformation.
True Stress
Yielding
Anelastic Deformation
Solid Solution
37. The stress required to produce a very slight yet specified amount of plastic strain.
Isotropic
Atomic Packing Factor (APF)
Screw Dislocation
Yield Strength
38. Exhibiting different values of a property in different crystallographic directions.
True Strain
Toughness
Anisotropic
Hardness
39. The natural logarithm of the ratio of instantaneous gauge length to original guage length of a specimen being deformed by a uniaxial force.
Design Stress
Engineering Strain
Nonsteady- state Diffusion
True Strain
40. Material transport by atomic motion.
Boltzmann's Constant
Steady- state Diffusion
Diffusion
Body- centered Cubic (BCC)
41. The instantaneous applied load divided by the instantaneous cross - sectional area of a specimen.
True Stress
Crystal Structure
Anisotropic
Toughness
42. A measure of a material's ability to undergo appreciable plastic deformation before fracture; may be expressed as percent elongation (%EL) or percent reduction area (%RA) from a tensile test.
Ductility
Steady- state Diffusion
Edge Dislocation
Hardness
43. The curve that results when the concentration of a chemical species is plotted versus position in a material.
Concentration Profile
Interstitial Diffusion
Yield Strength
Unit Cells