# Civil Engineering - Strength of Materials

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

11.

If the width b and depth d of a beam simply supported with a central load are interchanged, the deflection at the centre of the beam will be changed in the ratio of

 A. b/d B. d/b C. (d/b)2 D. (b/d)2 E. (b/d)3.

Explanation:

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12.

In the given below figure, the rivets with maximum stress, are :

 A. 1 and 2 B. 1 and 3 C. 3 and 4 D. 2 and 4

Explanation:

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13.

The maximum stress intensity due to a suddenly applied load is x-times the stress intensity produced by the load of the same magnitude applied gradually. The value of x is

 A. 1 B. 2 C. 3 D. E.

Explanation:

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14.

For the beam shown in below figure, the maximum positive bending moment is nearly equal to negative bending moment when L1 is equal to

 A. 1.0 L B. 0.7 L C. 0.5 L D. 0.35 L.

Explanation:

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15.

Strain energy of a member may be equated to

 A. average resistance x displacement B. stress x strain x area of its cross-section C. stress x strain x volume of the member D. (stress)2 x volume of the member + Young's modulus E.