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theory of structures MCQs

Practise focused theory of structures questions with marked answers for exam preparation and subject revision.

theory of structures Mcqs

1. Pick up the correct statement from the following?
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A. Volumetric change in the cylinder due to liquid is (pd/2tE) (5/2 2/m)

B. All the above

C. Longitudinal strain in the walls of a cylinder due to liquid is (pd/2 tE) (1/2 1/m)

D. Hoop strain of the walls of a cylinder due to liquid is (pd/2tE) (1 1/2m)

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________________?
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A. 264 MN

B. 274 MN

C. 284 MN

D. 294 MN

3. 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_______________?
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A. E = 2N (1 + 1/m)

B. (3/2)K (1 2/m) = N (1 + 1/m)

C. All the above

D. E = 3K (1 2/m)

4. A simply supported rolled steel joist 8 m long carries a uniformly distributed load over it span so that the maximum bending stress is 75 N/mm. If the slope at the ends is 0.005 radian and the value of E = 0.2 106 N/mm2, the depth of the joist, is________________?
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A. 200 mm

B. 250 mm

C. 300 mm

D. 400 mm

5. a uniform circular bar of diameter d and length , which extends by an The deflection of amount under a tensile pull , when it carries the same load at its mid-span, is___________________?
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A. el/3d

B. el/3d

C. el/2d

D. el/3d

6. static equations i.e. H V M = 0, to a determinate structure, we may By applying the determine_________________?
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A. All the above

B. Supporting reactions only

C. Bending moments only

D. Shear forces only

7. The equivalent length of a column of length L, having both the ends hinged, is_______________?
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A. L

B. L

C. 2L

D. L/2

8. A body is said to be in equilibrium if___________________?
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A. It moves vertically

B. It rotates about its C.G.

C. It moves horizontally

D. None of these

9. Shear strain energy theory for the failure of a material at elastic limit, is due to_________________?
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A. Guest or Trecas

B. St. Venant

C. Von Mises

D. Rankine

10. The S.F. diagram of a loaded beam shown in the given figure is that of________________?
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A. A simply supported beam with uniformly distributed load

B. A simply supported beam with isolated central load

C. A cantilever with a uniformly distributed load

D. A cantilever with an isolated load at the free end

11. The forces acting normally on the cross section of a bar shown in the given figure introduce_____________?
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A. Compressive stress

B. None of these

C. Tensile stress

D. Shear stress

12. In the truss shown in the given figure, the force in member BC is______________?
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A. 100 t compressive

B. Indeterminate

C. 100 t tensile

D. Zero

13. 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)____________________?
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A. b c = Eb /Ec

B. P = Pb + Pc

C. P = Ab b + Ac b

D. All the above

14. A material is said to be perfectly elastic if__________________?
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A. None of these

B. It regains its original shape partially on removal of the load

C. It does not regain its original shape at all

D. It regains its original shape on removal of the load

15. Pick up the correct statement from the following?
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A. All the above

B. For a load varying linearly, the shear force curve is a parabola

C. For a uniformly distributed load, B.M. curve is a parabola

D. For a uniformly distributed load, the shear force varies linearly

16. The force in BC of the truss shown in the given figure, is___________________?
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A. 3.0 t tension

B. 3.0 t compression

C. t compression

D. t tension

17. 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___________________?
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A. 4-Jan

B. 1/2

C. 8-Jan

D. 3-Jan

18. The radius of gyration of a rectangular section (depth D, width B) from a centroidal axis parallel to the width is__________________?
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A. D/2

B. D

C. D

D. D

19. A simply supported beam carries varying load from zero at one end and w at the other end. If the length of the beam is a, the maximum bending moment will be_______________?
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A. wa

B. wa/27

C. wa

D. wa/27

20. The locus of the end point of the resultant of the normal and tangential components of the stress on an inclined plane, is________________?
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A. Straight line

B. Circle

C. Ellipse

D. Parabola

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