Mechanics of Materials & Structures Online Test – Paper 3

1. *When the equal and opposite forces are applied to a body, tending to elongate it, then the stress produced is called

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

3. *Normal strain is defined as

4. The brittle materials have low toughness because they

5. The effective length of a column effectively held in position and restrained in direction at one end will be

6. *Thrust is induced in the case of

7. Find the value of thrust, if the member (beam) is subjected to an inclined force having a magnitude of 5 kN and an inclination with the vertical of 30°

8. A beam of uniform strength will have at every cross-section the same

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

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

11. At the point of application of concentrated load on a beam, there is

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

13. *Load required to produce unit deflection is called

14. Which one is correct if the deflection of a beam is y

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

16. *Young's modulus is the ratio of

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

18. *Proof resilience is the greatest stored energy at

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

20. Maximum bending moment occurs at the center if the simply supported beam is subjected to

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

22. *Centrifugal force is given by

23. In a beam, the neutral plane

24. Rate of change of bending moment is equal to

25. Normally, the numerical value of Poisson's is

26. Centrifugal force acts away from the center of the path while centripetal force

27. For a column of given material, the Rankine's constant depends on

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

29. Bending moment diagram of simply supported beam with a point load at the centre of the span is

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

31. If the value of Young's Modulus of elasticity for a material is zero, it implies that the material is

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

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

34. The expression EI(d^4y/dx^4) at any section for a beam is equal to

35. 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

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

37. If the elasticity of the material is zero then the material is said to be

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

39. 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

40. The maximum deflection of a simply supported beam subjected to a uniformly distributed load (w) over the span is

41. For keeping the stress wholly permissible, the load may be applied to a circular column anywhere within a concentric circle of diameter

42. The section modulus of a rectangular section is proportional to

43. *Find the maximum bending moment in a simply supported beam loaded with a UDL of 2 t/m having a span of 4m

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

45. A column that fails primarily due to direct stress is called

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

47. The maximum deflection in a cantilever beam carrying a concentrated load 'w' at the free end is (Where L is span of bean, W is total load and EI is flexural rigidity)

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

49. *The slope of an elastic curve at the point of contraflexture

50. *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: