Mechanics Of Materials & Structures Online Test

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Vikash chaudhary

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Total Questions: 50
Time Allotted: 50 minutes
Passing Score: 70%
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1 / 50

1. *The compression test is commonly used for testing

a) ductile materials

b) rubber

c) brittle materials

d) none of the above

2 / 50

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

a) inversely proportional

b) directly proportional

c) curvilinear related

d) all of the above

3 / 50

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

a) d/2

b) d/3

c) d/4

d) d/5

4 / 50

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

a) 0.3 for steel

b) 0.15 for concrete

c) both (a) and (b) of the above

d) none of the above

5 / 50

5. Load carrying capacity of fixed beam is

a) lesser than simply supported beam

b) lesser than the cantilever beam

c) greater than simply supported beam and cantilever beam

d) all of the above

6 / 50

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

a) ETα

b) ET/α

c) Eα/T

d) Tα/E

7 / 50

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

a) does not act

b) away from the center of the path

c) towards the center of the path

d) all of the above

8 / 50

8. *Centrifugal force is given by

a) v^2/R

b) mv^2/R

c) mxa

d) all of the above

9 / 50

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

a) maximum BM

b) sudden change in the slope of BM

c) point of contraflexture

d) maximum deflection

10 / 50

10. Moment of inertia of a rectangular beam bxd is

a) bd^3/12

b) bd^3/6

c) db^3/12

d) db^3/6

11 / 50

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

a) breaking point

b) plastic point

c) yielding point

d) elastic point

12 / 50

12. The diagram showing the variation of axial load along the span is called

a) thrust diagram

b) shear force diagram

c) bending moment diagram

d) none of the above

13 / 50

13. *Proof resilience is the greatest stored energy at

a) limit of proportionality

b) elastic limit

c) plastic limit

d) yield point

14 / 50

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

a) malleability

b) ductility

c) plasticity

d) elasticity

15 / 50

15. Which of the following gives Poisson's ratio?

a) ratio of linear stress to linear strain

b) ratio of shear stress to shear strain

c) ratio of lateral strain to longitudinal strain

d) ratio of the normal stress

16 / 50

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

a) axial loading

b) vertical loading

c) horizontal loading

d) none of these

17 / 50

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

a) V = M/Z

b) V = MY/I

c) V = dM/dx

d) V = Mdx

18 / 50

18. Rate of change of bending moment is equal to

a) shear force

b) slope

c) deflection

d) none of the above

19 / 50

19. A simply supported beam of length I carries a load varying uniformly from zero at the left end to the maximum at the right end. The maximum bending moment occurs at a distance of

a) 1/√3 from the left end

b) 1/3 from left end

c) 1/√3 from the right end

d) 1/3 from the right end

20 / 50

20. The bending moment diagram for a cantilever beam subjected to a moment at the end of the beam would be

a) rectangle

b) triangle

c) parabola

d) cubic parabola

21 / 50

21. Strain energy of a member may be defined as work done on it

a) to deform it

b) to resist elongation

c) to resist shortening

d) all of the above

22 / 50

22. *Load required to produce unit deflection is called

a) stiffness

b) ductility

c) elasticity

d) malleability

23 / 50

23. Which of the following gives Modulus of Rigidity

a) the ratio of linear stress to linear strain

b) the ratio of shear stress to shear strain

c) the ratio of lateral strain to longitudinal strain

d) the ratio of the normal stress

24 / 50

24. The shear center may be defined as

a) the point through which the resultant of the shear stress pass

b) the point about which the moment of shear flow is zero

c) the center of gravity of the section

d) none of the above

25 / 50

25. Permanent set is

a) the force that acts permanently on the body

b) irrecoverable deformation in the body

c) the shape of the member just after the completion of construction

d) the ratio of Poisson's ratio to Young's modulus

26 / 50

26. The difference in ordinate of the shear force between any two sections is equal to the area under

a) shear curve between these two sections

b) load curve between these two sections

c) bending moment curve between these two sections

d) load curve between these two sections plus concentrated load applied between the sections

27 / 50

27. The rate of change of shear force is called

a) BM

b) point load

c) intensity of load

d) slope

28 / 50

28. Longitudinal cracks observed in timber beams are due to

a) high bending stresses

b) application of concentrated loads over the beam

c) shear failure between the layers

d) timber not being in compression

29 / 50

29. *Normal strain is defined as

a) rate of change of length

b) strain that normally occurs

c) strain that is normal to shear strain

d) deformation normal to the force

30 / 50

30. *Stress may be defined as force

a) volume

b) length

c) area

d) none of the above

31 / 50

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

a) normal stress

b) tension stress

c) axial stress

d) transverse shear stress

32 / 50

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

a) maximum

b) minimum

c) either maximum or minimum

d) none of the above

33 / 50

33. *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

a) WL/2

b) WL/2

c) WL^2/12

d) WL/9

34 / 50

34. *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:

a) compressive stress

b) shear stress

c) bending stress

d) elastic modulus

35 / 50

35. *Dead load of a member is the

a) one that remains constant

b) one that occurs due to the dead body

c) one that comes all of a sudden

d) one that comes due to the self-weight of the object

36 / 50

36. *As the elastic limit reaches, tensile strain

a) decreases more rapidly

b) increases more rapidly

c) decreases in proportion to the stress

d) increases in proportion to the stress

37 / 50

37. 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

a) 1:n

b) n:1

c) 1:1/n

d) 1/n:1

38 / 50

38. Which of the following end conditions permits the displacement in any direction and also rotation

a) fixed end

b) hinge end

c) free end

d) roller end

39 / 50

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

a) endurance limit

b) fatigue stress

c) tolerance limit

d) elastic limit

40 / 50

40. *The simple bending equation is

a) M/y = σ/I = E/R

b) M/I = σ/y = E/R

c) M/R = σ/y = E/R

d) none of the above

41 / 50

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

a) at the C.G. of the section

b) at the neutral axis of the section

c) on the C.G. horizontal plane and away from C.G. within the leg projections

d) none of the above

42 / 50

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

a) P= 2π^2EI/l^2

b) P = π^2EI/4l^2

c) P= 4π^2EI/l^2

d) none of the above

43 / 50

43. *The inclined member carrying compressive load in the case of frames and trusses is

a) Post

b) stanchion

c) strut

d) column

44 / 50

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

a) the square root of the moment of inertia

b) the square root of the inverse of the area

c) the square root of the moment of inertia divided by the area of the section

d) none of the above

45 / 50

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

a) 2 t-m

b) 4 t-m

c) 6 t-m

d) 8 t-m

46 / 50

46. A brittle material has

a) no plastic zone

b) no inelastic zone

c) a very little plastic zone

d) a large plastic zone

47 / 50

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

a) the slope of loading at that section

b) the ordinate of loading diagram at that section

c) the area of loading diagram from end to that section

d) the bending moment at that section

48 / 50

48. *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:

a) 8 KN-m

b) 16 KN-m

c) 32 KN-m

d) 44 KN-m

49 / 50

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

a) 117.2

b) 17.3

c) 173.2

d) 137.2

50 / 50

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

a) must be equal to zero

b) greater than zero

c) need not be equal to zero

d) none of the above

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