# Mechanical Engineering - Strength of Materials

Exercise : Strength of Materials - Section 6
11.
A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission's ratio of the bar in tension will be __________ the Poisson's ratio for the bar in compression.
equal to
less than
greater than
Explanation:
No answer description is available. Let's discuss.

12.
A square beam and a circular beam have the same length, same allowable stress and the same bending moment. The ratio of weights of the square beam to the circular beam is
1/2
1
1/1.12
1/2
Explanation:
No answer description is available. Let's discuss.

13.
A thin cylindrical shell of diameter (d), length (l) and thickness (t)is subjected to an internal pressure (p). The hoop stress in the shell is
pd/t
pd/2t
pd/4t
pd/6t
Explanation:
No answer description is available. Let's discuss.

14.
When a body is subjected to a direct tensile stress (σ) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle θ to the normal of the section is
σ sin 2θ
σ cos 2θ
σ/2 sin 2θ
σ/2 cos 2θ