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16. The three moments equation is applicable only when

A. the beam is prismatic

B. there is no settlement of supports

C. there is no discontinuity such as hinges within the span

D. the spans are equal

Explanation:

17. The number of independent displacement components at each joint of a rigid-jointed space frame is

A. 1

B. 2

C. 3

D. 6

Explanation:

18. When a uniformly distributed load, shorter than the span of the girder, moves from left to right, then the conditions for maximum bending moment at a section is that

A. the head of the load reaches the section

B. the tail of the load reaches the section

C. the load position should be such that the section divides it equally on both sides

D. the load position should be such that the section divides the load in the same ratio as it divides the span

Explanation:

19. For a symmetrical two hinged parabolic arch, if one of the supports settles horizontally, then the horizontal thrust

A. is increased

B. is decreased

C. remains unchanged

D. becomes zero

Explanation:

20. For stable structures, one of the important properties of flexibility and stiffness matrices is that the elements on the main diagonal i) of a stiffness matrix must be positive ii) of a stiffness matrix must be negative iii) of a flexibility matrix must be positive iv) of a flexibility matrix must be negative The correct answer is

A. (i) and (iii)

B. (ii) and (iii)

C. (i) and (iv)

D. (ii) and (iv)

Explanation:

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