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

Related Mcqs:

1. 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_______________?

   A. BD²/6
   B. BD3/6
   C. BD3/12
   D. B²D/6

2. The ratio of moments of inertia of a triangular section about its base and about a centroidal axis parallel to its base, is_________________?

   A. 1.0
   B. 1.5
   C. 2.0
   D. 3.0

3. Y are the bending moment, moment of inertia, radius of curvature, modulus of If M, I, R, E, F, and elasticity stress and the depth of the neutral axis at section, then________________?

   A. M/I = R/E = F/Y
   B. I/M = R/E = F/Y
   C. M/I = E/R = E/Y
   D. M/I = E/R = Y/F

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

   A. F/A
   B. F/2A
   C. 3F/2A
   D. 2F/3A

5. For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is________________?

   A. 0.303
   B. 0.404
   C. 0.505
   D. 0.707

6. A close coil helical spring when subjected to a moment M having its axis along the axis of the helix_________________?

   A. It is subjected to pure bending
   B. Its mean diameter will decrease
   C. Its number of coils will increase
   D. All the above

7. A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is________________?

   A. L/d
   B. L/2d
   C. (L/2d)²
   D. (L/3d)²

8. The ratio of the length and depth of a simply supported rectangular beam which experiences maximum bending stress equal to tensile stress, due to same load at its mid span, is_______________?

   A. 1/2
   B. 2/3
   C. 1/4
   D. 1/3

9. d constant, the width of a cantilever of length l of uniform strength loaded with Keeping the depth a uniformly distributed load w varies from zero at the free end and________________?

   A. (2w/ × l² at the fixed end
   B. (3w/ × l² at the fixed end
   C. (3w/ × l² at the fixed end
   D. (5w/ × l² at the fixed end

10. A cantilever of length 2 cm and depth 10 cm tapers in plan from a width 24 cm to zero at its free end. If the modulus of elasticity of the material is 0.2 × 106 N/mm2, the deflection of the free end, is________________?

    A. 2 mm
    B. 3 mm
    C. 4 mm
    D. 5 mm