MMET 207 Lab Final Exam Questions and Answers | Latest Version | 2024/2025 | Graded A+
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Course
MMET 207 Lab
Institution
MMET 207 Lab
MMET 207 Lab Final Exam Questions
and Answers | Latest Version | 2024/2025
| Graded A+
What is the main purpose of metallography in materials testing?
Metallography helps analyze the microstructure of metals to determine material properties,
such as grain size, phase distribution, and defe...
MMET 207 Lab Final Exam Questions
and Answers | Latest Version | 2024/2025
| Graded A+
What is the main purpose of metallography in materials testing?
✔✔Metallography helps analyze the microstructure of metals to determine material properties,
such as grain size, phase distribution, and defects.
Why is it essential to use mounting and polishing in sample preparation?
✔✔Mounting and polishing ensure a smooth, even surface that allows for clear microscopic
examination of the sample's microstructure.
How does hardness testing contribute to understanding a material's properties?
✔✔Hardness testing measures a material's resistance to deformation, which correlates to strength
and wear resistance.
What does the Rockwell hardness test measure, and why is it widely used?
✔✔The Rockwell test measures hardness based on the depth of penetration under a specific load,
making it a quick and repeatable method for various materials.
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, Why is it crucial to etch a metal sample before microscopic examination?
✔✔Etching reveals microstructural details, like grain boundaries and phases, that are not visible
on a polished sample surface.
What does tensile testing measure, and how is it performed?
✔✔Tensile testing measures a material’s response to a stretching force and involves pulling a
specimen until it fractures, assessing strength and ductility.
What does the term "ductility" mean in materials testing?
✔✔Ductility refers to a material's ability to deform plastically without breaking, indicating its
capacity to withstand elongation under stress.
Why are safety protocols essential in a materials testing lab?
✔✔Safety protocols prevent accidents, protect individuals from hazards, and ensure safe
handling of equipment and materials.
What is the primary function of a Charpy impact test?
✔✔The Charpy test measures a material’s toughness by determining the energy absorbed during
fracture.
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