Mechanics Of Materials & Structures Online Test

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Vikash chaudhary

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Total Questions: 50
Time Allotted: 50 minutes
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1 / 50

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

a) same

b) half

c) twice

d) thrice

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. A beam fixed at both ends with a central load W in the middle will have zero bending moment

a) at one place

b) at two places

c) at three places

d) none of the above

4 / 50

4. For a beam of uniform strength if its depth is maintained constant then its width will vary in proportion to

a) bending moment

b) (B.M)^2

c) (B.M)^3

d) (B.M)

5 / 50

5. The maximum bending moment caused by a moving load on a fixed-end beam occurs

a) at the support

b) under the load

c) at mid span

d) none of the above

6 / 50

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

a) compounding

b) coaxing

c) relaxing

d) enduring

7 / 50

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

a) 1

b) 2

c) 3

d) 4

8 / 50

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

a) column

b) strut

c) tie

d) tanchion

9 / 50

9. *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

10 / 50

10. 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

11 / 50

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

a) circular arc

b) parabolic arc

c) catenary

d) all of the above

12 / 50

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

a) WL^3 / 8EI

b) WL^3 / 48EI

c) 5WL^3 / 48EI

d) none of the above

13 / 50

13. 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

14 / 50

14. 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

15 / 50

15. 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

a) triangle and quadratic parabola

b) quadratic parabola and cubic parabola

c) rectangle and triangle

d) quadratic parabola and rectangle

16 / 50

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

a) zero

b) maximum

c) minimum

d) average of maximum-minimum

17 / 50

17. The value of Poisson's ratio always remains

a) greater than one

b) lesser than one

c) equal to one

d) none of these

18 / 50

18. Find the bending moment at the center and also find the maximum bending moment

a) 10 kN-m, 12 kN-m

b) 15 kN-m, 10 kN-m

c) 20 kN-m, 12 kN-m

d) 10 kN-m, 15 kN-m

19 / 50

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

a) bd^3/12

b) bd^2/24

c) b^2d^2/12

d) db^3/24

20 / 50

20. *Tensile internal force tends to:

a) crush the member

b) elongate the member

c) shorten the member

d) smash the member

21 / 50

21. Buckling load for a given column depends upon

a) length of the column only

b) least lateral dimension only

c) both length and least lateral dimension

d) none of the above

22 / 50

22. Rate of change of bending moment is equal to

a) shear force

b) slope

c) deflection

d) none of the above

23 / 50

23. 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

24 / 50

24. The zone between the elastic limit and proportional limit on the elastic curve of an elastic material is known as

a) linear elastic zone

b) non-linear elastic zone

c) plastic zone

d) none of the above

25 / 50

25. The c.g. of a semi-circular arc is

a) r/π

b) r/2π

c) r/3π

d) 2r/π

26 / 50

26. 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°

a) 2.5 kN

b) 5 kN

c) 2.5 √3 kN

d) 7.5 kN

27 / 50

27. *If a beam is loaded transversely, the maximum compressive stress develops on

a) top fiber

b) neutral axis

c) bottom fiber

d) every cross-section

28 / 50

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

a) long column

b) short column

c) weak column

d) none of the above

29 / 50

29. A beam simply supported at ends is subjected to load. The maximum bending moment is located where

a) shear force is zero

b) shear force is maximum

c) bending moment is zero

d) axial thrust is zero

30 / 50

30. 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

31 / 50

31. 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

32 / 50

32. *"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

33 / 50

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

a) at the support

b) under the load

c) at mid span

d) none of the above

34 / 50

34. The brittle materials have low toughness because they

a) have large plastic deformation before failure

b) have small plastic deformation before failure

c) have no plastic deformation before failure

d) can absorb impact load also

35 / 50

35. 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)

a) 3WL^3 / 2EI

b) WL^3 / 8EI

c) WL^3 / 5EI

d) WL^3 / 3EI

36 / 50

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

a) yielding

b) creeping

c) breaking

d) none of the above

37 / 50

37. *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

38 / 50

38. *As per the elastic theory of design, the factor of safety is the ratio of

a) working stress to field stress

b) yield stress to working stress

c) ultimate stress to yield stress

d) ultimate load to load at yield

39 / 50

39. What is strain energy?

a) stress x strain

b) volume x stress x strain

c) energy that is spent for straining a body

d) energy stored in a body because of being strained

40 / 50

40. 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

41 / 50

41. 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

42 / 50

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

a) the area of bending moment between the two sections

b) the difference between the slopes of the curve of the loading diagram at two sections

c) the ordinate of shear force diagram at one section plus the slope of the loading diagram multiplied by the distance between two sections

d) the area of the loading diagram between those two sections

43 / 50

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

a) plasticity

b) ductility

c) elasticity

d) malleability

44 / 50

44. *Which of the following is dimensionless?

a) bulk modulus

b) strain

c) shear stress

d) none of the above

45 / 50

45. Find the maximum BM induced in a simply supported beam if the beam is subjected to a point load of 4 KN at the center of the beam and the span of the beam is 4 m

a) 8 KN-m

b) 4 KN-m

c) 2 KN-m

d) 1 KN-m

46 / 50

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

a) co-planer non-concurrent forces

b) non-coplanar concurrent forces

c) non-coplanar non-concurrent forces

d) none of the above

47 / 50

47. *A tie is a member which

a) is subjected axial compression only

b) is subjected axial tension only

c) is subjected moment tension only

d) is subjected two equal and opposite forces.

48 / 50

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

a) linear

b) parabolic

c) cubic

d) deflection is zero

49 / 50

49. 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

50 / 50

50. The moment of inertia of a triangular section b x h about the base is

a) bh^3/12

b) bh^3/18

c) bh^3/36

d) all of the above

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