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MMET 206 Exam #1 Questions and Answers | Latest Version | 2024/2025 | Rated A+
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MMET 206 Exam #1 Questions and Answers | Latest Version | 2024/2025 | Rated A+ What is the primary difference between ferrous and non-ferrous metals? Ferrous metals contain iron, while non-ferrous metals do not. What property of a material measures its ability to conduct heat? Thermal c...

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  • October 29, 2024
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  • 2024/2025
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MMET 206 Exam #1 Questions and
Answers | Latest Version | 2024/2025 |
Rated A+
What is the primary difference between ferrous and non-ferrous metals?


✔✔Ferrous metals contain iron, while non-ferrous metals do not.




What property of a material measures its ability to conduct heat?


✔✔Thermal conductivity.




Why are polymers typically more flexible than metals?


✔✔Polymers have a molecular structure that allows them to bend without breaking due to long-

chain molecules and weaker intermolecular forces.




How does the hardness of a metal relate to its ductility?


✔✔Generally, higher hardness indicates lower ductility, as harder materials tend to be more

brittle.




What type of material is glass classified as in materials science?


1

,✔✔Glass is classified as a non-crystalline or amorphous solid.




Why is stainless steel resistant to corrosion?


✔✔It contains chromium, which forms a protective oxide layer on the surface.




What does the term “alloy” mean in the context of metals?


✔✔An alloy is a combination of two or more elements, where at least one is metal, that

improves properties such as strength and corrosion resistance.




What is meant by "toughness" in materials science?


✔✔Toughness is the ability of a material to absorb energy and deform without fracturing.




What is the primary purpose of using a composite material?


✔✔To combine materials with different properties to achieve superior strength, stiffness, or

weight reduction.




What is the main role of a heat treatment process in metals?




2

, ✔✔Heat treatment alters the internal structure of a metal, modifying its mechanical properties,

such as hardness and ductility.




Why do materials expand when heated?


✔✔Increased kinetic energy causes atoms to vibrate and occupy more space, leading to thermal

expansion.




What is the difference between elasticity and plasticity?


✔✔Elasticity is the ability of a material to return to its original shape after deformation, while

plasticity is the capacity to undergo permanent deformation without breaking.




How does increasing a metal’s grain size generally affect its strength?


✔✔Larger grain size typically reduces a metal’s strength but increases its ductility.




What test would you use to measure a material’s resistance to scratching or indentation?


✔✔A hardness test, such as the Rockwell or Brinell hardness test.




What property makes aluminum a popular choice in the aerospace industry?



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