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  • Question
  • The radius of gyration of a rectangular section (depth D, width B) from a centroidal axis parallel to the width is


  • Options
  • A. The radius of gyration of a rectangular section (depth D, width B) from a centroidal axis parallel t
  • B. The radius of gyration of a rectangular section (depth D, width B) from a centroidal axis parallel t
  • C. The radius of gyration of a rectangular section (depth D, width B) from a centroidal axis parallel t
  • D. The radius of gyration of a rectangular section (depth D, width B) from a centroidal axis parallel t

  • Correct Answer
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  • Theory of Structures problems


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    • 1. A compound truss may be formed by connecting two simple rigid frames, by

    • Options
    • A. two bars
    • B. three bars
    • C. three parallel bars
    • D. three bars intersecting at a point.
    • Discuss
    • 2. If the normal stresses due to longitudinal and transverse loads on a bar are ?1 and ?2 respectively, the tangential component of the stress on an inclined plane through ?°, the longitudinal load is

    • Options
    • A. ?1 sin ? + ?2 cos ?
    • B. ?1 sin ?2 + ?2 cos2 ?
    • C.
    • D.
    • Discuss
    • 3. m1 and m2 are the members of two individual simple trusses of a compound truss. The compound truss will be rigid and determinate if

    • Options
    • A. m = m1 + m2
    • B. m = m1 + m2 + 1
    • C. m = m1 + m2 + 2
    • D. m = m1 + m2 + 3
    • Discuss
    • 4. A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the bar, is

    • Options
    • A. 411 N mm
    • B. 511 N mm
    • C. 611 Nmm
    • D. 711 N mm
    • Discuss
    • 5. The force in EC of the truss shown in the given figure, is

    • Options
    • A. zero
    • B. 5t tension
    • C. 5t compression
    • D. 4t tension
    • E. None of these.
    • Discuss
    • 6. The ratio of the section modulus of a square section of side B and that of a circular section of diameter D, is

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 7. In case of a simply supported I-section beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is

    • Options
    • A.
    • B.
    • C.
    • D.
    • E. none of these.
    • Discuss
    • 8. For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is

    • Options
    • A. 0.303
    • B. 0.404
    • C. 0.505
    • D. 0.606
    • E. 0.707
    • Discuss
    • 9. To determine the force in BD of the truss shown in the given figure a section is passed through BD, CD and CE, and the moments are taken about

    • Options
    • A. A joint
    • B. B joint
    • C. C joint
    • D. D joint.
    • Discuss
    • 10. In case of principal axes of a section

    • Options
    • A. sum of moment of inertia is zero
    • B. difference of moment inertia is zero
    • C. product of moment of inertia is zero
    • D. none of these.
    • Discuss


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