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Civil Engineering :: Theory of Structures

  1. The ratio of the deflections of the free end of a cantilever due to an isolated load at 1/3rd and 2/3rd of the span, is

  2. A.

     1/7

    B.

     2/7

    C.

     3/7

    D.

     2/5


  3. A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 × 106 kg/cm², the side of the rod, is

  4. A.

     1 cm

    B.

     1.5 cm

    C.

     2 cm

    D.

     2.5 cm


  5. The assumption in the theory of bending of beams is:

  6. A.

     Material is homogeneous

    B.

     Material is isotropic

    C.

     Young’s modulus is same in tension as well as in compression

    D.

     All the above


  7. The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span; flexural rigidity being EI, is

  8. A.

     WL3/3EL

    B.

     WL3/8EL

    C.

     WL3/24EL

    D.

     WL3/48EL


  9. The horizontal thrust on the ends of a two hinged semicircular arch of radius ‘R’ carrying

  10. A.

     A uniformly distributed load ? per unit run over its right half span, is ? ?R/?

    B.

     A uniformly distributed load ? per unit run over its entire span is 4/3 ?R/?

    C.

     A distributed load varying from zero at the left end to ? per unit horizontal run at the right end, is ? ?R/?

    D.

     All the above


  11. For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is

  12. A.

     0.303

    B.

     0.404

    C.

     0.505

    D.

     0.707


  13. H V are the algebraic sums of the forces resolved horizontally and vertically respectively, M is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon

  14. A.

     H = 0

    B.

     V = 0

    C.

     M = 0

    D.

     All the above


  15. The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged, is

  16. A.

     1

    B.

     2

    C.

     3

    D.

     4


  17. The equivalent length of a column of length L, having both the ends hinged, is

  18. A.

     2L

    B.

     L

    C.

     L/2

    D.

     L


  19. There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of

  20. A.

     1 : 1½ : 2

    B.

     2 : 1½ : 1

    C.

     1 : 1 : 2

    D.

     None of these