MMET 206 Exam #1 Questions and Answers | Latest Version | 2024/2025 | Rated A+
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Course
MMET 206
Institution
MMET 206
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...
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?
3
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