# Civil Engineering - Strength of Materials

### Exercise :: Strength of Materials - Section 3

31.

At either end of a plane frame, maximum number of possible bending moments, are

 A. one B. two C. three D. four E. zero.

Explanation:

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32.

The principal stresses at a point are 100, 100 and-200 kgf/cm2, the octo hedral shear stress at the point is :

 A. 100 2 kg/cm2 B. 200 2 kg/cm2 C. 300 2 kg/cm2 D. 400 2 kg/cm2 E. 500 2 kg/cm2.

Explanation:

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33.

During a tensile test on a ductile material

 A. nominal stress at fracture is higher than the ultimate stress B. true stress at fracture is higher than the ultimate stress C. true stress at fracture is the same as the ultimate stress D. none of these.

Explanation:

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34.

Rankine-Golden formula accounts for direct as well as buckling stress and is applicable to

 A. very long columns B. long columns C. short columns D. intermediate columns E. all the above.

Explanation:

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35.

Pick up the correct statement from the following :

 A. The point through which the resultant of the shear stresses, passes is known as shear centre B. In the standard rolled channels, the shear centre is on the horizontal line passing through and away from the C.G. beyond web C. In equal angles, the shear centre is on the horizontal plane and away from the C.G., outside of the leg projection D. In T-sections, the shear centre is at the C.G. of the section E. All the above.