# Civil Engineering - Theory of Structures

### Exercise :: Theory of Structures - Section 3

1.

If a concrete column 200 x 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 and Es is 15 Ec

 A. 264 MN B. 274 MN C. 284 MN D. 294 MN E. None of these.

Explanation:

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2.

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

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

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3.

A shaft subjected to a bending moment M and a torque T, experiences

 A. maximum bending stress = B. maximum shear stress = C. both (a) and (b) D. neither (a) nor (b)

Explanation:

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4.

In the truss shown in given figure the force in member DC is A. 100 t compressive B. 100 t tensile C. zero D. indeterminate

Explanation:

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5.

If M, I, R, E, F, and Y are the bending moment, moment of inertia, radius of curvature, modulus of elasticity stress and the depth of the neutral axis at section, then

 A. B. C. D. 