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GATE 2023 || Strength of Materials || Quiz 14

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Question 1

Three beams of same material have the same length, same allowable bending stress and are subjected to the same maximum bending moment. The cross-sections of the beams are a circle, square and a rectangle with depth thrice the width. The ratios of their weights are

Question 2

In a simply supported beam, the maximum value of bending stress is 400MPa. If the beam undergoes only pure bending where the maximum value of bending moment is 20KN-m, find out its diameter.

Question 3

Which of the following is true about the bending stress?

Question 4

If the section modulus of the beam decreases, then bending stress will

Question 5

A thin strip of copper (E = 120 GPa) having length L and thickness, t = 1 mm is bent into a circle and held with the ends just touching. The maximum bending stress in the strip is limited to 250 MPa. The length of the strip is

Question 6

At a cross section of a beam,the maximum compressive stress at top is 800 kg/cm2 and the maximum tensile stress at bottom is 200 kg/cm2.The depth of cross section is 10 cm.The depth of neutral axis from the top of the section is x.Then x is equal to _______.
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