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, as the maximum shear stress in a rectangular section occurs at the neutral axis.
- Statement (B) is true; shear stress varies parabolically across a beam's section.
- Statement (C) is correct, since shear deformations in beams are typically much smaller than bending deformations.
- Statement (D) is also true; the shear centre is the point where an applied shear force causes no twisting, and it is also referred to as the centre of moment.