Mechanics of Materials & Structures Online Test – Paper 3

1. If y is the deflection of the beam, then shear force is

2. Centrifugal force acts at a curve

3. *Fatigue is the failure of a material under:

4. The moment of inertia of a square section is given by

5. The number of reaction components at a hinge on rollers support is

6. *The magnitude of a shear force at a distance of L/4 from either end of a simply supported beam with load P applied at midspan is equal to:

7. *Young's modulus is the ratio of

8. Find the elongation of a bar if c/s area of the bar is A, length 1, applied load p, modulus of elasticity of material is E

9. *A beam is said to be of uniform strength if

10. *Stress in a beam due to simple bending is

11. *Moment of inertia of an object having rectangular section of 'b' as width and 'd' as depth is given by:

12. The maximum bending moment caused on a simply supported beam subjected to two equal concentrated loads (W/2) spaced at an equal distance (L/3) over the span is

13. What is tenacity?

14. *If the shear force along a section of a beam is zero, the bending moment at the section is:

15. In the case of an H section, the maximum shear stress will occur at

16. A shear force diagram of a simply supported beam shows constant shear force throughout the span. It is subjected to

17. The shear force on a beam is proportional to

18. In a beam, the neutral plane

19. The variation of the bending moment in the portion of the beam carrying a linearly varying load is

20. *The ratio of change in volume to the original volume is called:

21. The strain energy stored by a member when strained within the elastic limit is known as

22. The safe value of stress below which the material will not fail when subjected to a reversal of stress is known as

23. *Centrifugal force is given by

24. A brittle material has

25. The property of material by which it can be drawn, due to tension, to a smaller section, is called

26. *The rate of change of shear force is called

27. *The product EI is called

28. The difference between SF values at any two sections will be equal to

29. *Tensile internal force tends to:

30. *"If a rod is simultaneously pulled at both of its ends, it will be a case of:

31. *Dead load of a member is the

32. *The centre of gravity of a triangle is at the point where three

33. *Which of the following sections is the most efficient in carrying bending moments

34. The moment of inertia of an area will be least with respect to

35. The phenomenon of slow growth of strain under steady tensile stress, i.e., increasing with time, is called

36. A cantilever beam is the one which is supported with

37. *Toughness is

38. *The forces which meet at one point, but their lines of action do not lie in a plane, are called:

39. The method of increasing fatigue resistance by overstressing the metal by successively increasing the loading is known as

40. If all the dimensions of a bar are increased in the proportion n:1, the proportion with which the maximum stress produced in the prismatic bar by its own weight will increase in the ratio

41. *The stress at which the extension of a material takes place more quickly as compared to the increase in load is called

42. The beam strongest in flexure will have the maximum

43. *The S.I. unit of the modulus of elasticity is

44. An isotropic material has

45. The algebraic sum of the shear flow of a section in any direction must be equal to

46. If the stress produced by a prismatic bar is equal to the working stress, the area of the cross-section of the prismatic bar becomes

47. *Determinate beam can be analyzed with the help of

48. The property of material by which it can be beaten or rolled into plates is called

49. The maximum shear stress will always occur at

50. The limit of proportionality depends upon