Quiznetik

Structural Mechanics | Set 2

1. The moment of inertia of a body is always minimum with respect to its

Correct : B. Centroidal axis

2. Moment of inertia is the

Correct : D. All of these

3. In a simply supported beam carrying a uniformly distributed load W/m over the left half span, the point of contra flexure will occur in

Correct : D. Does not exist

4. A sudden increase or decrease in shear force diagram between any two points indicates that there is

Correct : B. Point loads between the two points

5. When the bending moment is parabolic curve between two points, it indicates that there is

Correct : C. U.D.L. between the two points

6. In Fig.(a), max B.M. will be

Correct : B. 50 kN-m

7. In Fig. (a), slope of S.F.D. between B and C will be

Correct : A. Zero

8. What is the bending moment at end supports of a simply supported beam?

Correct : C. Zero

9. What is the maximum shear force, when a cantilever beam is loaded with udl throughout?

Correct : A. w×l

10. Sagging, the bending moment occurs at the of the beam.

Correct : B. Mid span

11. What will be the variation in BMD for the diagram? [Assume l = 2m].

Correct : C. Triangular

12. What is the maximum bending moment for simply supported beam carrying a point load “W” kN at its centre?

Correct : D. W×l/4 kNm

13. How do point loads and udl be represented in SFD?

Correct : C. Simple lines and inclined lines

14. curve is formed due to bending of overhanging beams.

Correct : A. Elastic

15. The relation between slope and maximum bending moment is

Correct : B. Inversely proportion

16. What is the SF at support B?

Correct : D. 0 kN

17. Where do the maximum BM occurs for the below diagram.

Correct : C. -105 kNm

18. Shear force is unbalanced to the left or right of the section.

Correct : B. Vertical force

19. SI units of shear force is

Correct : C. kN

20. Determine the moment at fixed end.

Correct : D. 80 kNm

21. Shear force diagram is representation of shear force plotted as ordinate.

Correct : C. Graphical

22. Hogging is

Correct : A. Negative bending moment

23. At the point of contraflexure, the value of bending moment is

Correct : A. Zero

24. Positive/negative bending moments occur where shear force changes its sign.

Correct : C. Maximum

25. Shear force of following diagram

Correct : A. Rectangle

26. SI units of Bending moment is

Correct : C. kNm

27. What is the other name for a positive bending moment?

Correct : B. Sagging

28. For any part of the beam, between two concentrated load Shear force diagram is a

Correct : A. Horizontal straight line

29. For any part of a beam subjected to uniformly distributed load, bending moment diagram is

Correct : D. Parabola

30. A sudden jump anywhere on the Bending moment diagram of a beam is caused by

Correct : A. Couple acting at that point

31. The diagram shown below, depicts bending diagram for

Correct : D. simply supported beam with uniformly distributed load

32. A 10 m long cantilever beam is fixed at point B. What is the bending moment at point B, if 5 m span of AC carries uniform distributed load of 10 kN/m

Correct : C. 375 kN/m

33. What is the maximum shear force acting on the beam shown below.

Correct : B. 200 N

34. At a point in a simply supported or overhanging beam where Shear force changes sign and Bending moment is

Correct : A. Maximum

35. The beam having one end free and one end fixed is called as

Correct : A. Cantilever beam

36. Uniformly varying load between two sections in shear force diagram is represented by

Correct : D. parabolic curve

37. In bending moment diagram, if no load acts between two sections, then it is represented by

Correct : B. inclined line

38. What is the maximum bending moment acting on simply supported beam shown below?

Correct : D. 6000 Nm

39. A beam is said to be of uniform strength, if

Correct : D. Bending stress is the same at every section along its longitudinal axis

40. What is the product of sectional modulus and allowable bending stress called as?

Correct : C. Moment of resistance

41. A uniformly distributed load of 20 kN/m acts on a simply supported beam of rectangular cross section of width 20 mm and depth 60 mm. What is the maximum bending stress acting on the beam of 5m?

Correct : B. 5208 Mpa

42. Neutral axis of a beam always coincides with

Correct : D. Axis passing through centroid

43. Net force acting on the cross section of beam in bending is

Correct : C. Zero

44. Net force acting on the cross section of beam in bending is

Correct : D. None

45. Which is more stronger in bending equal area square or circular beam

Correct : B. Circular beam

46. Why is a composite beam is converted into a beam of one material

Correct : A. Bending equation is applicable to one material beam

47. Bending equation is applicable to a beam of

Correct : B. Homogeneous material

48. In a composite beam bending, strain at the common interface will be

Correct : A. Equal

49. Brittle material beams need reinforcement on the

Correct : A. Tension side

50. In bending, neutral axis always is

Correct : B. Coincides with the centroidal axis

51. The direction of bending stresses is along the

Correct : A. Axial direction

52. Bending stresses in a beam vary

Correct : A. Linearly

53. Bending stresses in a beam are of

Correct : B. Variable values

54. Pure bending of beam will have

Correct : C. Tensile and compressive stresses

55. In a cantilever beam, fibers below the neutral axis are in

Correct : C. Compression

56. In a S.S. beam, fibers below the neutral axis are in

Correct : A. Tension

57. In a cantilever beam, fibers above the neutral axis are in

Correct : A. Tension

58. Bending occurs due to the application of

Correct : C. Load perpendicular to the axis

59. Bending occurs due to the application of

Correct : B. Lateral load

60. The bending stress is

Correct : A. Directly proportional to the distance of layer from the neutral layer

61. On bending of a beam, which is the layer which is neither elongated nor shortened?

Correct : D. None of the mentioned