At any point of a beam, the section modulus may be obtained by dividing the moment of inertia of the section by A. Depth of the section B. Depth of the neutral axis C. Maximum tensile stress at the section D. Maximum compressive stress at the section

The correct answer is: B. Depth of the neutral axis.

The section modulus is a property of a beam cross-section that is used to determine the beam’s resistance to bending. It is defined as the moment of inertia of the cross-section divided by the distance from the neutral axis to the extreme fiber. The neutral axis is the axis in a beam cross-section where there is no bending stress. The moment of inertia is a measure of how resistant a cross-section is to bending. The greater the moment of inertia, the more resistant the cross-section is to bending. The distance from the neutral axis to the extreme fiber is the distance from the neutral axis to the outermost fibers of the cross-section. The greater the distance from the neutral axis to the extreme fiber, the greater the resistance of the cross-section to bending.

The other options are incorrect because:

• Option A is incorrect because the depth of the section is not a factor in determining the section modulus.
• Option C is incorrect because the maximum tensile stress at the section is not a factor in determining the section modulus.
• Option D is incorrect because the maximum compressive stress at the section is not a factor in determining the section modulus.