MMET 207 Exam III Questions and Answers | Latest Update | 2024/2025 | Graded A+
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MMET 207
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MMET 207
MMET 207 Exam III Questions and
Answers | Latest Update | 2024/2025 |
Graded A+
What is one key characteristic that distinguishes ductile materials from brittle materials?
Ductile materials can undergo significant plastic deformation before fracture, while brittle
materials fracture with l...
MMET 207 Exam III Questions and
Answers | Latest Update | 2024/2025 |
Graded A+
What is one key characteristic that distinguishes ductile materials from brittle materials?
✔✔Ductile materials can undergo significant plastic deformation before fracture, while brittle
materials fracture with little to no deformation.
What is a notable advantage of using aluminum in structural applications?
✔✔Aluminum is lightweight yet strong, making it ideal for applications where reducing weight
is crucial, such as in aerospace and automotive industries.
What disadvantage is commonly associated with using high-carbon steel?
✔✔High-carbon steel is often more brittle and less ductile than lower-carbon steels, making it
prone to cracking under stress.
Explain the term "corrosion resistance" in metals.
✔✔Corrosion resistance refers to a material's ability to withstand deterioration due to chemical
reactions with its environment, which is crucial for longevity in applications exposed to harsh
conditions.
1
,What is one advantage of using titanium in aerospace applications?
✔✔Titanium has a high strength-to-weight ratio and excellent corrosion resistance, making it a
preferred choice for components that require durability without adding significant weight.
What is a key disadvantage of polymer materials compared to metals?
✔✔Polymers typically have lower thermal and electrical conductivity than metals, limiting their
use in applications requiring heat or electrical transfer.
How does the grain structure of a metal influence its mechanical properties?
✔✔The grain structure affects a metal's strength, toughness, and ductility; finer grains usually
enhance strength, while coarser grains can lead to increased ductility.
What is one characteristic of composite materials that makes them advantageous?
✔✔Composite materials combine properties of different materials to achieve superior
characteristics, such as high strength, low weight, and resistance to environmental degradation.
Describe a disadvantage of using ceramics in engineering applications.
2
, ✔✔Ceramics are typically brittle and can fracture easily under tensile stress, which limits their
use in applications that require high impact resistance.
What is the significance of thermal expansion in metallic materials?
✔✔Thermal expansion refers to the tendency of metals to expand when heated; understanding
this property is crucial for design considerations in environments with temperature fluctuations.
How does fatigue resistance impact the performance of materials?
✔✔Fatigue resistance determines a material's ability to withstand repeated loading cycles
without failure, which is vital for components subjected to dynamic stresses, like aircraft wings.
What characteristic makes stainless steel a preferred choice for kitchenware?
✔✔Stainless steel is resistant to rust and corrosion, making it hygienic and durable for use in
kitchen environments where exposure to moisture and acidic foods is common.
What are the implications of using high-strength low-alloy (HSLA) steel in construction?
✔✔HSLA steel offers improved mechanical properties and greater resistance to atmospheric
corrosion compared to conventional carbon steel, allowing for lighter structures with greater
load-bearing capabilities.
3
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