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Mechanical Engineering - Strength of Materials

Exercise : Strength of Materials - Section 3
21.
Which of the following statement is wrong?
In the theory of simple bending, the assumption is that the plane sections before bending remains plane after bending.
In a beam subjected to bending moment, the strain is directly proportional to the distance from the neutral axis.
At the neutral axis of a beam, the bending stress is maximum.
The bending stress in a beam is inversely proportional to the section modulus.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
If the modulus of elasticity of a material is twice its modulus of rigidity, then the Poisson's ratio of the material is equal to zero.
Correct
Incorrect
Answer: Option
Explanation:
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23.
A beam of T-section is subjected to a shear force of F. The maximum shear force will occur at the
top of the section
bottom of the section
neutral axis of the section
junction of web and flange
Answer: Option
Explanation:
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24.
When there is no increase or decrease in shear force between two points, it indicates that there is no change in the bending moment between these points.
True
False
Answer: Option
Explanation:
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25.
Two bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in the ratio of 2:5, then the ratio of modulus of elasticity of the two materials will be
2:5
5:2
4:3
3:4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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