Material Sciences MCQ
1. What kind of materials are hard materials?
Answer
Correct Answer:
Do not lose magnetization easily
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2. What is another term for free energy?
Answer
Correct Answer:
Energy that is available to do work
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3. What term is used to describe the study of crack growth?
Answer
Correct Answer:
Fracture mechanics
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4. What is the term for the amount of flexural stress a material can withstand before breaking?
Answer
Correct Answer:
Flexural strength
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5. What is the law known as Fick's First Law of Diffusion?
Answer
Correct Answer:
States that the rate of diffusion, or flux, J of a species is proportional to the concentration gradient
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6. What describes the diffusion of atoms when the concentration is changed with time?
Answer
Correct Answer:
Fick's second law
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7. What property demonstrates that some materials are ferromagnetic?
Answer
Correct Answer:
Permanent aligned dipoles
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8. What is interstitial carbon in bcc iron?
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9. What type of energy is the highest electron energy at 0K?
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10. What is the limit where stress does not affect fatigue?
Answer
Correct Answer:
Fatigue limit
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11. What does the term fatigue life refer to?
Answer
Correct Answer:
The number of stress cycles that will cause a fatigue failure
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12. What does the term engineering stress mean?
Answer
Correct Answer:
Average force divided by the original cross-sectional area
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13. What can make a strain on a sample?
Answer
Correct Answer:
Change in length of sample
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14. What does the electron-attracting ability of atoms in compounds mean?
Answer
Correct Answer:
Electronegative
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15. What is the arrangement of electrons in an atom?
Answer
Correct Answer:
Electron configuration
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16. What is the term for a material that doesn't break when it is under a load?
Answer
Correct Answer:
Ductility
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17. What deforms plastic, cracks grow slowly and can stop?
Answer
Correct Answer:
Ductile Materials
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18. What is the dislocation line?
Answer
Correct Answer:
Dislocation line the line extending along the extra partial plane of atoms in an edge dislocation
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19. What does the diffusion constant increase with?
Answer
Correct Answer:
Temperature
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20. What is an example of the movement of molecules from an area of higher concentration to an area of lower concentration?
Answer
Correct Answer:
Diffusion
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21. What is Diamagnetism?
Answer
Correct Answer:
Induced magnetic dipole in opposite direction of applied magnetic field
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22. What is the name of the process by which a polymer is created?
Answer
Correct Answer:
Polymerization
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23. What is the name given to the regular repeatable lattice of the atoms in a material?
Answer
Correct Answer:
Crystal structure
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24. A solid that is made up of crystals in which particles are arranged in a regular, repeating pattern is called what?
Answer
Correct Answer:
Crystalline
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25. What occurs when max stress at a point is less than the critical stress?
Answer
Correct Answer:
Crack propagation
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26. What allows atoms to share electrons in a molecule?
Answer
Correct Answer:
Covalent bond
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27. What is the term used to describe the number of atoms that are adjacent to a given atom?
Answer
Correct Answer:
Coordination number
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28. What type of test is performed to determine if a material will withstand a specified load?
Answer
Correct Answer:
Charpy test
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29. What does the item "Ceramic Impurities" mean?
Answer
Correct Answer:
Must maintain charge neutrality
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30. What type of material is ceramics?
Answer
Correct Answer:
Unreactive and do not corrode
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31. What does the name positive charge indicate?
Answer
Correct Answer:
Positively charged ion
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32. What type of metal is added to the anode?
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33. What type of dislocation causes the slip?
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34. What is the name of the vector which represents the direction and magnitude of the slip caused by a single dislocation?
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35. What type of fracture does not require significant deformation of the specimen before the crack is visible?
Answer
Correct Answer:
Brittle fracture
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36. What is a branched polymer?
Answer
Correct Answer:
A polymer having a molecular structure of secondary chains that extend from the primary main chains
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37. What is defined as bonding energy?
Answer
Correct Answer:
Net energy of attraction
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38. What is the Bohr atomic model?
Answer
Correct Answer:
Electrons orbiting the nucleus in well defined paths
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39. What is the name of the phase formed by quenching steel?
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40. What does an austenite have as a structure?
Answer
Correct Answer:
Face-centred cubic
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41. What is the name of the structure formed when iron is between 912 ° and 1,394 °C?
Answer
Correct Answer:
Austenite
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42. What is the name of the property that expresses the number of atomic units in a selected unit cell?
Answer
Correct Answer:
Atomic packing factor
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43. What is the atomic number of a nucleus of an element?
Answer
Correct Answer:
Number of protons
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44. What is the atomic mass unit used to measure?
Answer
Correct Answer:
The mass of particles in atoms
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45. What is a property of antiferromagnets?
Answer
Correct Answer:
Alignment of magnetic dipoles
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46. What is the purpose of annealing?
Answer
Correct Answer:
To soften a metal or alloy
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47. What property does the typical rock exhibit?
Answer
Correct Answer:
Anisotropy
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48. What type of ion is an anion?
Answer
Correct Answer:
Negatively charged
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49. What type of polymer is an alternating sequence of monomers?
Answer
Correct Answer:
Alternating copolymer
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50. What type of steel contains carbon and other metals?
Answer
Correct Answer:
Alloy steel
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51. What is a mixture made up of two or more metals?
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52. What is the term for the ability of a substance to exist in more than one phase in the liquid state?
Answer
Correct Answer:
Allotropy
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53. What is the amount of energy needed to get a reaction started?
Answer
Correct Answer:
Activation energy
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54. What can HSLA alloys be used for?
Answer
Correct Answer:
Transportation-equipment components
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55. What are all the forms that HSLA steels can be used in?
Answer
Correct Answer:
Wrought forms
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56. What are LSLA steels available in?
Answer
Correct Answer:
All standard wrought forms
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57. What does HSLA stand for?
Answer
Correct Answer:
High-strength low-alloy
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58. What is the increase in length of a rubber specimen because of tensile force being applied to the specimen?
Answer
Correct Answer:
Elongation
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59. What are the three factors that affect elongation?
Answer
Correct Answer:
Hardness, tensile strength, and modulus
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60. Once the yield point is passed, what will be permanent and non-reversible?
Answer
Correct Answer:
Deformation
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61. What is the term for a point in a material that it will be permanently deformed?
Answer
Correct Answer:
Yield strength
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62. What is the definition of yield strength?
Answer
Correct Answer:
The stress at which a material begins to deform plastically
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63. Along with complex ions, what do cyclic molecules form?
Answer
Correct Answer:
Stable complex ions
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64. What group of elements are referred to as Transition Metal?
Answer
Correct Answer:
Groups 3 to 12
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65. What is a typical example of a refractory metal?
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66. What is an internal ridge or rim?
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67. What type of strength measures the force required to pull something to the point where it breaks?
Answer
Correct Answer:
Tensile Strength
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68. What is a crucible used for?
Answer
Correct Answer:
Metal, glass, and pigment production
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69. What can a crucible withstand?
Answer
Correct Answer:
Extremely hot temperatures
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70. What is a phenomenon of exactly zero electrical resistance?
Answer
Correct Answer:
Superconductivity
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71. What does the insulating oxide layer form?
Answer
Correct Answer:
Dielectric
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72. What is the main use of tantalum?
Answer
Correct Answer:
Tantalum Capacitor
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73. What type of hardness is not measured by the ASTM?
Answer
Correct Answer:
Scratch hardness
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74. What is the third property of a material that can be measured?
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75. What are the different measurements of hardness?
Answer
Correct Answer:
Scratch hardness, indentation hardness, and rebound hardness
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76. What is ASTM's focus?
Answer
Correct Answer:
Voluntary consensus technical standards
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77. What is ASTM's previous name?
Answer
Correct Answer:
American Society for Testing and Materials
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78. What may be the last two digits in UNS?
Answer
Correct Answer:
Variations
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79. What type of alloy does "S" stand for?
Answer
Correct Answer:
Stainless steel alloys
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80. What is the UNS an alloy designation system widely accepted in?
Answer
Correct Answer:
North America
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81. What does UNS stand for?
Answer
Correct Answer:
Unified numbering system
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82. How are alloy mixtures made?
Answer
Correct Answer:
By various routes
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83. What are alloys made up of?
Answer
Correct Answer:
A metal with other elements
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84. What is an example of an alteration that occurs during annealing?
Answer
Correct Answer:
Ductility
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85. What is the critical temperature for annealing?
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86. What type of process would be used to form the metal if the temperature of the metal is at or below the recrystallization temperature?
Answer
Correct Answer:
Hot Rolling
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87. What is the process of heat treating used to increase the toughness of iron-based alloys?
Answer
Correct Answer:
Tempering
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88. Tempering is usually performed after what?
Answer
Correct Answer:
Hardening
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Aerospace & Aeronautical Engineering MCQs | Topic-wise
