MP Sub-Engineer ME: Bending and Shear Stresses Quiz 14

Which of the following is true about the bending stress?

A copper wire of 3 mm diameter is bent into a circle and held with its end just in contact. If the maximum permissible strain in copper is 0.003. The minimum length (in mm) of the wire required______.

A beam cross-section is used in two different orientations as shown in the figure given below. Bending moments applied to the beam in both cases are same. The maximum bending stresses induced in cases (A. and (B. are related as

If E = elasticity modulus, I = moment of inertia about the neutral axis and M = bending moment in pure bending under the symmetric loading of a beam, the radius of curvature of the beam:
1). Increases with E
2). Increases with M
3). Decreases with I
4). Decreases with M
Which of these are correct ___________?

A cantilever beam of triangular cross-section is subjected to a point load at free end. Find the ratio of maximum shear stress to shear stress at neutral axis.

Ratio of section modulus of two rectangular sections A and B where breadth of A is twice that B and depth of A is 1/2 times the depth of B is _____.

A rectangular cross section beam is 2m long and is simply supported at ends as shown in the figure. Find the ratio of bending stress on fibre A to fibre B at given cross section.