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)____________________?

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. If a concrete column 200 × 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 and Es is 15 Ec________________?

   A. 264 MN
   B. 274 MN
   C. 284 MN
   D. 294 MN

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

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

4. 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

5. The ratio of the length and diameter of a simply supported uniform circular beam which experiences maximum bending stress equal to tensile stress due to same load at its mid span, is___________________?

   A. 1/8
   B. 1/4
   C. 1/2
   D. 1/3

6. 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

7. A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 × 106 kg/cm2, the side of the rod, is_________________?

   A. 1 cm
   B. 1.5 cm
   C. 2 cm
   D. 2.5 cm

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

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

9. The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged, is________________?

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

10. 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°