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Civil Engineering :: Theory of Structures

  1. The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is

  2. A.

    \( \frac { WI^3 } { 3EI} \)

    B.

    \( \frac { WI^4 } { 3EI} \)

    C.

    \( \frac { WI^4 } { 8EI} \)

    D.

    \( \frac { WI^4 } { 12EI} \)


  3. A material is said to be perfectly elastic if

  4. A.

    it regains its original shape on removal of the load

    B.

    It regains its original shape partially on removal of the load

    C.

    it does not regain its original shape at all

    D.

    none of these.


  5. For calculating the allowable stress of long columns. The empirical formula , is known as

  6. A.

    Straight line formula

    B.

    Parabolic formula

    C.

    Perry's formula

    D.

    Rankine's formula.


  7.  

    Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as

  8. A.

    Compound beams

    B.

    Indeterminate beams

    C.

    Determinate beams

    D.

    Composite beams.


  9. Pick up the correct statement from the following:

  10. 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.

    The ratio of plastic moment to the yield moment, is called shape factor

    E.

    All the above.


  11. The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is

  12. A.

    \( \frac { F } { A } \)

    B.

    \( \frac { F } { 2A } \)

    C.

    \( \frac { 3F } { 2A } \)

    D.

    \( \frac { 2F } { 3A } \)


  13. Two bars, one of steel and the other of copper having areas of cross-sections As and Ac, coefficient of expansion \(\alpha\)s and \(\alpha\)c and Young's Modulii Es and Es are rigidly connected together at the ends and subjected to temperature change of t°. If the length of the bars initially is L, the final extension \(\delta\) of the two bars at t° temperature is given by


  14. The tangential component of stress on an plane inclined θ° to the direction of the force, may be obtained by multiplying the normal stress by

  15. A.

    sin θ

    B.
    cos θ
    C.

    tan θ

    D.

    sin θ cos θ

    E.

    sin2θ


  16. The force in AD of the truss shown in given figure, is

  17. A.

    4.0t compression

    B.

    3.0t compression

    C.

    0.5t compression

    D.

    0.5t tension

    E.

    zero.


  18. 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

  19. A.

    1 : 1 1/2 : 2

    B.

    2 : 1 1/2 : 1

    C.

    1 : 1 : 2

    D.

    none of these.