Strength of Materials Questions and Answers – Stress & Strain Curve

This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on “Stress & Strain Curve”.

1. The slope of the stress-strain curve in the elastic deformation region is ____________
a) Elastic modulus
b) Plastic modulus
c) Poisson’s ratio
d) None of the mentioned
View Answer

Answer: a
Explanation: The elastic modulus is the ratio of stress and strain. So on the stress strain curve, it is the slope.

2. What is the stress-strain curve?
a) It is the percentage of stress and stain
b) It is the relationship between stress and strain
c) It is the difference between stress and strain
d) None of the mentioned
View Answer

Answer: b
Explanation: The relationship between stress and strain on a graph is the stress strain curve. It represents the change in stress with change in strain.

3. Which point on the stress strain curve occurs after the proportionality limit?
a) Upper yield point
b) Lower yield point
c) Elastic limit
d) Ultimate point
View Answer

Answer: c
Explanation: The curve will be stress strain proportional upto the proportionality limit. After these, the elastic limit will occur.
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4. Which point on the stress strain curve occurs after the lower yield point?
a) Yield plateau
b) Upper yield point
c) Ultimate point
d) None of the mentioned
View Answer

Answer: a
Explanation: The points on the curve comes in the given order,
A. proportionality limit
B. elastic limit
C. upper yield point
D. lower yield point
E. yield plateau
F. ultimate point
G. breaking point.

5. Which point on the stress strain curve occurs after yield plateau?
a) lower yield point
b) Upper yield point
c) Ultimate point
d) Breaking point
View Answer

Answer: c
Explanation: After the yield plateau the curve will go up to its maximum limit of stress which is its ultimate point.
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6. Which point on the stress strain curve occurs after the ultimate point?
a) Last point
b) Breaking point
c) Elastic limit
d) Material limit
View Answer

Answer: b
Explanation: After the ultimate point the value of stress will reduce on increasing of strain and ultimately the material will break.

7. Elastic limit is the point ____________
a) up to which stress is proportional to strain
b) At which elongation takes place without application of additional load
c) Up to which if the load is removed, original volume and shapes are regained
d) None of the mentioned
View Answer

Answer: c
Explanation: The elastic limit is that limit up to which any material behaves like an elastic material.
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8. What is the point P shown on the stress strain curve?
The point P shown on the stress strain curve is Yield plateau
a) Upper yield point
b) Yield plateau
c) Elastic limit
d) Ultimate point
View Answer

Answer: d
Explanation: It is the point showing the maximum stress to which the material can be subjected in a simple tensile stress.

9. What is the point P shown in the stress-strain curve?
The point P shown in the stress-strain curve is Breaking point
a) Lower yield point
b) Elastic limit
c) Proportionality limit
d) Breaking point
View Answer

Answer: d
Explanation: The breaking point is the point where the material breaks. The breaking point will be the last point on the stress strain curve.
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10. What is the point shown in the stress strain curve?
The point shown in the stress strain curve is Lower yield point
a) Elastic limit
b) Lower yield point
c) Yield plateau
d) Lower strain point
View Answer

Answer: b
Explanation: It is the lower yield point at which the curve levels off and plastic deformation begins.

11. Where is the necking region?
a) The area between lower yield point and upper yield point
b) The area between the plastic limit and elastic limit
c) The area between the ultimate point and initial point
d) The area between the ultimate point and rupture
View Answer

Answer: d
Explanation: Necking is a tensile strain deformation which is cased in after the ultimate amount of stress occurs in the material.

Sanfoundry Global Education & Learning Series – Strength of Materials.

To practice all areas of Strength of Materials, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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