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Civil Engineering :: Theory of Structures

  1. A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be,

  2. A.

     10 m

    B.

     12 m

    C.

     14 m

    D.

     16 m


  3. The stiffness of the close coil helical spring is

  4. A.

     d4N/8D3n

    B.

     d4N/4D3n

    C.

     4D3N/d4n

    D.

     8D3N/d4n


  5. Pick up the correct statement from the following:

  6. A.

     In a loaded beam, the moment at which the first yield occurs is called yield moment

    B.

     In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment

    C.

     In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area

    D.

     All the above


  7. Maximum strain theory for the failure of a material at the elastic limit, is known as

  8. A.

     Guest's or Trecas' theory

    B.

     St. Venant's theory

    C.

     Rankine's theory

    D.

     Haig's theory


  9. A body is said to be in equilibrium if

  10. A.

     It moves horizontally

    B.

     It moves vertically

    C.

     It rotates about its C.G.

    D.

     None of these


  11. A close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is

  12. A.

     4WD²n/d4N

    B.

     4W²Dn/d4N

    C.

     4W²D3n/d4N

    D.

     4W²D3n²/d4N


  13. A two hinged parabolic arch of span l and rise h carries a load varying from zero at the left end to ? per unit run at the right end. The horizontal thrust is

  14. A.

     ωl²/4h

    B.

     ωl²/8h

    C.

     ωl²/12h

    D.

     ωl²/16h


  15. The maximum deflection due to a load W at the free end of a cantilever of length L and having flexural rigidity EI, is

  16. A.

     WL²/2EI

    B.

     WL²/3EI

    C.

     WL3/2EI

    D.

     WL3/3EI


  17. The ratio of moments of inertia of a triangular section about its base and about a centroidal axis parallel to its base, is

  18. A.

     1.0

    B.

     1.5

    C.

     2.0

    D.

     3.0


  19. Inertia of a rectangular section of width and depth about an axis passing the moment of through C.G. and parallel to its width is

  20. A.

     BD²/6

    B.

     BD³/6

    C.

     BD³/12

    D.

     B²D/6