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  • Question

  • For permissible shear stress fs, the torque transmitted by a thin tube of mean diameter D and wall thickness t, is


  • Options
  • A. For permissible shear stress fs, the torque transmitted by a thin tube of mean diameter D and wall t
  • B. For permissible shear stress fs, the torque transmitted by a thin tube of mean diameter D and wall t
  • C. ?D2t fs
  • D. For permissible shear stress fs, the torque transmitted by a thin tube of mean diameter D and wall t

  • Correct Answer
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    • Theory of Structures problems

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    • 1. The vertical reaction for the arch is

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    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 2. The maximum B.M. due to an isolated load in a three hinged parabolic arch, (span l, rise h) having one of its hinges at the crown, occurs on either side of the crown at a distance

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    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 3. The area of the core of a column of cross sectional area A, is

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    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. A compound bar consists of two bars of equal length. Steel bar cross-section is 3500 mm2 and that of brass bar is 3000 mm2. These are subjected to a compressive load 100,000 N. If Eb = 0.2 MN/mm2 and Eb = 0.1 MN/mm2, the stresses developed are:

    • Options
    • A. ?b = 10 N/mm2, ?s = 20 N/mm2
    • B. ?b = 8 N/mm2, ?s = 16 N/mm2
    • C. ?b = 6 N/mm2, ?s = 12 N/mm2
    • D. ?b = 5 N/mm2, ?s = 10 N/mm2
      • Discuss
    • 5. Pick up the correct statement from the following:

    • Options
    • A. For a uniformly distributed load, the shear force varies linearly
    • B. For a uniformly distributed load, B.M. curve is a parabola
    • C. For a load varying linearly, the shear force curve is a parabola
    • D. For a load varying linearly, the B.M. curve is a cubic parabola
    • E. All the above.
      • Discuss
    • 6. If a three hinged parabolic arch, (span l, rise h) is carrying a uniformly distributed load w/unit length over the entire span,

    • Options
    • A. horizontal thrust is wl2/8h
    • B. S.F. will be zero throughout
    • C. B.M. will be zero throughout
    • D. all the above.
      • Discuss
    • 7. A bar of square section of area a2 is held such that its one of its diameters is vertical. The maximum shear stress will develop at a depth h where h is

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    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. A steel bar 5 m x 50 mm is loaded with 250, 000 N. If the modulus of elasticity of the material is 0.2 MN/mm2 and Poisson's ratio is 0.25, the change in the volume of the bar is :

    • Options
    • A. 1.125 cm3
    • B. 2.125 cm3
    • C. 3.125 cm3
    • D. 4.125 cm2
      • Discuss
    • 9. A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If ?steel = 0.000012/C°, Esteel = 0.2 MN/mm2, the tensile force developed at a temperature of 50°C, is

    • Options
    • A. 80 N/mm2
    • B. 100 N/mm2
    • C. 120 N/mm2
    • D. 150 N/mm2
      • Discuss
    • 10.  is the equation of Euler's crippling load, if

    • Options
    • A. both the ends are fixed
    • B. both the ends are hinged
    • C. one end is fixed and other end is free
    • D. one end is fixed and other end is hinged.
      • Discuss

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