Question

7) Which of the following is true? O The linear coefficient of thermal expansion is unique for each material (material property) O The displacement due to temperature is linearly related to the original length O Stress concentration factors relate the maximum stress to the average stress O Sharp corners should be avoided because they create stress concentrations. O All the above are true 8) Which of the following statements are true? O A simply supported beam which supports a load will be in compression on the top and tension on the bottom of the beam. O Concrete is better in compression than in tension. O Steel is a good material for compression or tension O Cast iron can be used in compression or tension but has to be limited in tension applications because it is not as good in tension O All are true. 9) Which of the following is true? O Derivative of the distributed load intensity with respect to distance is the shear force. O In bending deformation of a horizontal straight member, the horizontal lines remain straight. O Derivative of the moment with respect to distance is the shear force. O In bending deformation of a straight member, the maximum stress is at the neutral axis. O All are false Which of the following is False? O Parallel axis theorem must be used for unsymmetrical cross sections. O When finding the centroid of a cross section, the location of the 10) reference axis is arbitrary as long as it is parallel to the bending axis. O Referring to an I-Beam, the flanges carry the vast majority of the bending stress as opposed to the web O The flexure formula can only be applied when the bending occurs about axes that represent the principal axis of inertia for the cross section O All the above are true

Answer 1

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