Question

Consider the following statements about shear stresses in beams A The shear stress at neutral axis of a rectangular section is the maximum stress B The shear stress variation across a rectangular section is parabolic C The shear deformations are small as compared to bending deformation D The shear centre is also known as centre of moment

• A. A, B and C only
• B. B and C only
• C. A, B, C and D
• D. A, C and D only

Hint:

In beam theory shear stress distribution is parabolic and the maximum occurs at the neutral axis

Answer 1

The Correct Option is C

- Statement (A) is true because the maximum shear stress in a rectangular section occurs at the neutral axis.
- Statement (B) is true because shear stress varies parabolically across the section of a beam.
- Statement (C) is correct as shear deformations are typically much smaller than bending deformations in beams.
- Statement (D) is also true because the shear centre is the point where the applied shear force does not cause any twisting, and it is also called the centre of moment.