Mechanics of Materials & Structures Online Test – Paper 3

1. *A diagram that shows the variation of axial force

2. The value of buckling load is ... than the crushing load in the case of a long column

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. *A tie is a member which

5. *A point where SF is zero, BM is

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

7. *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:

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

9. The number of reaction components at a hinged end of a general loading is

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

11. The maximum bending moment in a simply supported beam loaded with a UDL of w/m having span l is

12. *Centre of gravity of a semi-circle is... above the base AB (Dia.)

13. If α is the coefficient of linear expansion, T is the rise in temperature, then thermal stress is given by

14. The crippling load for a column with both ends hinged is

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

16. A brittle material has

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

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

19. The point of contraflexure occurs in a beam

20. A member that is subjected to reversible tensile or compressible stress may fail at a stress lower than the ultimate stress of the material. The property of the metal is called

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

22. For a column, with both ends fixed, the crippling load will be equal to

23. The ratio of the effective length of a column and the minimum radius of gyration of its cross-sectional area is known as

24. The slenderness ratio of a vertical column of a square section of 2.5 cm sides and an effective length of 1.75 m is

25. The radius of gyration of a rectangular section is not proportional to

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

27. 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

28. The variation of the bending moment in the segment of a beam where no external load is present is

29. The shear center may be defined as

30. *The total time of collision and restitution of two bodies is called

31. *The ratio of the largest load in a test to the original cross-sectional area of the piece is called:

32. The rate of change of shear force is called

33. The shear center in the case of a T-beam section is

34. *Compression members always tend to buckle in the direction of the

35. *In the case of a fixed beam loaded at a point at its center, the number of points at which BM is zero

36. 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

37. Along the neutral axis of a simply supported beam

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

39. The maximum deflection of a beam occurs at

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

41. *The unit failure stress is taken as :

42. In an I section, almost all the shear force is taken by

43. *The bending moment at a section tends to bend or deflect the beam and internal stresses resist its bending. The resistance offered by the internal stress to the bending, is called:

44. *Load required to produce unit deflection is called

45. The bending moment in a cable carrying a system of loads will be

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

47. Buckling load for a given column depends upon

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

49. The maximum bending moment caused by a moment M applied at a distance 'a' from one end on a simply supported beam is.... (where L=span, a>L/2)

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