# Civil Engineering - Theory of Structures

### Exercise :: Theory of Structures - Section 4

1.

In case of principal axes of a section

 A. sum of moment of inertia is zero B. difference of moment inertia is zero C. product of moment of inertia is zero D. none of these.

Explanation:

No answer description available for this question. Let us discuss.

2.

The forces acting normally on the cross section of a bar shown in the given figure introduce A. compressive stress B. tensile stress C. shear stress D. none of these.

Explanation:

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3.

The maximum deflection due to a load W at the free end of a cantilever of length L and having flexural rigidity EI, is

 A. B. C. D. Explanation:

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4.

If the normal stresses due to longitudinal and transverse loads on a bar are σ1 and σ2 respectively, the tangential component of the stress on an inclined plane through θ°, the longitudinal load is

 A. σ1 sin θ + σ2 cos θ B. σ1 sin θ2 + σ2 cos2 θ C. D. Explanation:

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5.

The ratio of the section modulus of a square section of side B and that of a circular section of diameter D, is

 A. B. C. D. 