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  • Question

  • The radius of gyration of a section of area A and least moment of inertia I about the centroidal axis, is


  • Options
  • A. The radius of gyration of a section of area A and least moment of inertia I about the centroidal axi
  • B. The radius of gyration of a section of area A and least moment of inertia I about the centroidal axi
  • C. The radius of gyration of a section of area A and least moment of inertia I about the centroidal axi
  • D. The radius of gyration of a section of area A and least moment of inertia I about the centroidal axi

  • Correct Answer
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    • Theory of Structures problems

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

    • Options
    • A. 4.0t compression
    • B. 3.0t compression
    • C. 0.5t compression
    • D. 0.5t tension
    • E. zero.
      • Discuss
    • 2. Pick up the correct statement from the following:

    • Options
    • A. The point of intersection of the bending axis with the cross section of the beam, is called shear centre
    • B. For I sections, the shear centre coincides with the centroid of the cross section of the beam
    • C. For channels, the shear centre does not concide its centroid
    • D. Bending loads should pass through the shear centre to avoid twisting
    • E. All the above.
      • Discuss
    • 3. Stress may be expressed in Newtons

    • Options
    • A. per millimetre square (N/mm2)
    • B. per centimetre square (N/cm2)
    • C. per metre square (N/m2)
    • D. none of these.
      • Discuss
    • 4. In the truss shown in the given figure, the force in member BC is

    • Options
    • A. 100 t compressive
    • B. 100 t tensile
    • C. zero
    • D. indeterminate
      • Discuss
    • 5. A material is said to be perfectly elastic if

    • Options
    • 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.
      • Discuss
    • 6. A simply supported beam carries varying load from zero at one end and w at the other end. If the length of the beam is a, the maximum bending moment will be

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. 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

    • Options
    • A. 1 : 1 1/2 : 2
    • B. 2 : 1 1/2 : 1
    • C. 1 : 1 : 2
    • D. none of these.
      • Discuss
    • 8. If E, N, K and 1/m are modulus of elasticity, modulus of rigidity. Bulk modulus and Poisson ratio of the material, the following relationship holds good

    • Options
    • A.
    • B.
    • C.
    • D. all the above.
      • Discuss
    • 9. Two bars, one of steel and the other of copper having areas of cross-sections As and Ac, coefficient of expansion ?s and ?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 ? of the two bars at t° temperature is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. Stress may be defined as

    • Options
    • A. force per unit length
    • B. force per unit volume
    • C. force per unit area
    • D. none of these.
      • Discuss

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