Mechanics of Materials & Structures Online Test – Paper 3

1. A section of a beam is said to be in pure bending if it is subjected to

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

3. The maximum deflection in a cantilever beam carrying a uniformly distributed load (w) over spans is (Where L is span of beam, W is total load and EI is flexural rigidity)

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

5. How does Young's Modulus vary with an increase in temperature?

6. The stress due to temperature change in a member depends on

7. *A member which does not regain its original shape after the load producing deformation is removed, is said to be:

8. In simple bending theory, the assumption that a plane section before bending remains plane after bending implies that

9. *If a cantilever beam of 8m long has a uniformly distributed load of 2KN/m throughout the length and a 10KN point load at the center of the beam, find the moment at the center:

10. What is strain energy?

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

12. The stress necessary to initiate yielding is considerably

13. The slenderness ratio of a vertical column of square cross-section of 10 cm side and 500 cm long is

14. The slope of the curve of S.F. diagram at any section will be equal to

15. *The ratio of the intensity of stress in a case of a suddenly loaded to that of gradually applied load is

16. The bending moment acting on the plane of an element will cause the following type of stress on the plane

17. The maximum number of transverse shear forces possible at one end of an element of a plane frame are

18. If a constant section is subjected to a uniform/ pure bending moment throughout, its length bends to

19. Centrifugal force acts at a curve

20. The maximum shear stress will always occur at

21. The ratio of elongations of a conical bar due to its own weight and that of a prismatic bar of the same length is

22. *As the elastic limit reaches, tensile strain

23. If a cantilever beam carries a uniformly distributed load over its entire length, then the shape of the shear force diagram and bending moment diagram respectively are

24. Shape of the bending moment diagram for a simply supported beam having a point load at the center is

25. A long vertical member subjected to an axial compressive load is called

26. *The maximum bending moment caused by a moving load on a simply supported beam is

27. What is tenacity?

28. If magnitude and direction of a load does not change with respect to time, this type of load is called

29. *In a simply supported beam with span (L) having a triangular load with its intensity 0 at both ends and W at center. The maximum BM will be

30. Shear force diagram for a cantilever carrying a UDL over its whole length is

31. *The law which states that within elastic limits strain produced is proportional to stress producing it is known as:

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

33. *In a simply supported beam subjected to a point load at the center, the maximum bending moment occurs at

34. *The maximum bending moment in a simply supported beam UDL is applied

35. "When a rectangular beam is loaded transversely the maximum compressive stress is developed on the :

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

37. The point of contraflexure occurs in a beam

38. In a beam where shear force is maximum, the bending moment will be

39. *Maximum bending moment occurs where

40. If the length of a simply supported beam carrying a concentrated load at the center is doubled, the deflection at the center will become

41. If the Poisson's ratio of a material is 0.25, the ratio of Modulus of Rigidity to the Young's Modulus is

42. Buckling load for a given column depends upon

43. The limit of proportionality depends upon

44. *The maximum deflection of a simply supported beam subjected to a concentrated load (W) at the midpoint is

45. The crippling load for column of length 1, with one end fixed and the other end free is

46. Euler's formula for a column of length 1, with one end fixed and other hinged is

47. 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

48. *The product EI is called

49. *The shear force and bending moment are related by

50. *The shear force in a concrete beam is assumed to act