Mechanical Engineering :: Strength of Materials
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Which of the following statement is wrong?
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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.
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A beam of T-section is subjected to a shear force of F. The maximum shear force will occur at the
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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.
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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
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A beam of uniform strength may be obtained by
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The springs in brakes and clutches are used to
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The maximum deflection of a fixed beam carrying a central point load lies at
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When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where α = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)
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A.
In the theory of simple bending, the assumption is that the plane sections before bending remains plane after bending.
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B.
In a beam subjected to bending moment, the strain is directly proportional to the distance from the neutral axis.
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C.
At the neutral axis of a beam, the bending stress is maximum.
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D.
The bending stress in a beam is inversely proportional to the section modulus.
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