Exam-style question
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How can you determine the ultimate tensile strength from a stress-strain graph?.
- A.By finding the maximum point on the stress-strain curve.
- B.By measuring the slope of the curve.
- C.By calculating the area under the curve.
- D.By identifying the yield point.
Model answer
What a good answer should say
- By finding the maximum point on the stress-strain curve.
Explanation
Why this works
The evidence is the maximum point on the stress-strain curve, which represents the highest stress the material can withstand before failure. This indicates the ultimate tensile strength of the material.
The implication is that knowing the ultimate tensile strength is essential for predicting material behavior under load. Therefore, we conclude that the ultimate tensile strength can be determined by locating the maximum point on the graph.
Common mistake
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