A steel plate d × b is sandwiched rigidly between two timber joists each D × B/2 in section. The steel will be (where Young’s modulus of steel is m times that of the timber)_________________?

Related Mcqs:

1. 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_______________?

   A. E = 3K (1 – 2/m)
   B. E = 2N (1 + 1/m)
   C. (3/2)K (1 – 2/m) = N (1 + 1/m)
   D. All the above

2. A road of uniform cross-section A and length L force P. The Young’s Modulus E of the material, is_________________?

   A. E = /A. L
   B. E =/P. L
   C. E = P. L/
   D. E = P. A/

3. section modulus of a square section of side B and that of a circular section of The ratio of the diameter D, is___________________?

   A. 2 /15
   B. 3 /16
   C. 3 /8
   D. /16

4. 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_________________?

   A. wl3/3EI
   B. wl4/3EI
   C. wl4/8EI
   D. wl4/12EI

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

   A. Compound beams
   B. Indeterminate beams
   C. Determinate beams
   D. Composite beams

6. At any point of a beam, the section modulus may be obtained by dividing the moment of inertia of the section by_________________?

   A. Depth of the section
   B. Depth of the neutral axis
   C. Maximum tensile stress at the section
   D. Maximum compressive stress at the section

7. A steel bar 5 m × 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_________________?

   A. 1.125 cm3
   B. 2.125 cm3
   C. 3.125 cm3
   D. 4.125 cm2

8. 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

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_________________?

   A. 80 N/mm2
   B. 100 N/mm 2
   C. 120 N/mm2
   D. 150 N/mm2

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