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.

Answer: Option C

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.

Answer: Option B

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)

Answer: Option C

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

Answer: Option C

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.

Answer: Option C

Explanation:

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