The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a bar, is__________________?

Related Mcqs:

1. A compound bar consists of two bars of equal length. Steel bar cross -section is 3500 mm2and 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___________________?

   A. b = 10 N/mm2 s = 20 N/mm 2 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...

2. A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is_________________?

   A. WL/2AE B. WL/AE C. W²L/AE D. W²L/2AE...

3. 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...

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___________________?

   A. 411 N mm B. 511 N mm= C. 611 N mm D. 711 N mm...

5. 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...

6. Gradually applied static loads do not change with time their_______________?

   A. Magnitude B. Direction C. Point of application D. All the above...

7. For determining the support reactions at A and B of a three hinged arch, points B and Care joined and produced to intersect the load line at D and a line parallel to the load line through A at D’. Distances AD, DD’ and AD’ when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is___________________?

   A. 30° B. 45° C. 60° D. 90°...

8. cross sections of bronze and copper bars of equal lengt b c are their Ab and Ac are the respective stresses due to load P. If Pb and Pc are the loads shared by them, (where Eb and Ec are their modulii)____________________?

   A. b c = Eb /Ec B. P = Pb + Pc C. P = Ab b + Ac b D. All the above...

9. A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be________________?

   A. 2/3 B. 3/2 C. 5/8 D. 8/5...

10. The ratio of the maximum deflections of a simply supported beam with a central load W and of a cantilever of same length and with a load W at its free end, is________________?

    A. 1/8 B. 1/10 C. 1/12 D. 1/16...