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 S.I. unit of the modulus of elasticity is

a) N/cm^2

b) N/m^2

c) dyne/cm^2

d) none of the above

2 / 50

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

a) time of collision

b) period of collision

c) period of impact

d) all the above

3 / 50

3. *The ratio of change in volume to the original volume is called:

a) linear strain

b) lateral strain

c) volumetric strain

d) Poisson's ratio

4 / 50

4. Find the maximum SF induced in S.S 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) 1 KN

b) 2 KN

c) 4 KN

d) 8 KN-m

5 / 50

5. Find the slenderness ratio of the column of M.I. = 10000cm4, Area =100cm^2 & effective length =3.0m

a) 3

b) 30

c) 4

d) 40

6 / 50

6. *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

7 / 50

7. Centrifugal force acts at a curve

a) along the center line

b) towards the center

c) away from the center

d) all of the above

8 / 50

8. Along the neutral axis of a simply supported beam

a) fibers do not undergo strain

b) fibers undergo very little strain

c) the fibers are subjected to maximum stress

d) none of the above

9 / 50

9. 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

10 / 50

10. *The variation of the bending moment in the segment of a beam where the load is uniformly distributed is

a) linear

b) parabolic

c) cubic

d) rectangular

11 / 50

11. *Maximum bending moment occurs where

a) shear force is maximum

b) shear force is less than one

c) shear force changes sign

d) deflection is zero

12 / 50

12. Point of contraflexure is a point where bending moment

a) minimum

b) maximum

c) zero

d) changes sign

13 / 50

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

a) load intensity at the section

b) shear force at the section

c) BM at the section

d) slope of the section

14 / 50

14. 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

15 / 50

15. 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

16 / 50

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

a) elastic limit

b) plastic limit

c) breaking point

d) yielding point

17 / 50

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

a) two equations of statics

b) three equations of statics

c) four equations of statics

d) five equations of statics

18 / 50

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

a) less

b) more

c) equal

d) none of the above

19 / 50

19. The rate of change of shear force is called

a) BM

b) point load

c) intensity of load

d) slope

20 / 50

20. 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

21 / 50

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

a) rigid

b) perfect

c) plastic

d) all of the above

22 / 50

22. 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

23 / 50

23. 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

24 / 50

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

a) left end

b) right end

c) center

d) none of the above

25 / 50

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

a) deflection

b) stiffness

c) BM

d) bending stress

26 / 50

26. 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

27 / 50

27. The beam strongest in flexure will have the maximum

a) moment of inertia

b) section modulus

c) area of cross-section

d) none of the above

28 / 50

28. *"A simply supported beam of span L carries a uniformly distributed load W. The maximum bending moment, M is:

a) WL/2

b) WL/4

c) WL/8

d) WL/16

29 / 50

29. 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

30 / 50

30. *BM in a cantilever beam having a span of 1.8m and a uniformly distributed load of 4kg/m

a) 4.48 kg-m

b) 5.48 kg-m

c) 6.48 kg-m

d) none of the above

31 / 50

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

a) will increase

b) will not be affected

c) will decrease

d) impossible to predict

32 / 50

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

a) 2r/π

b) 4r/3π

c) r/8

d) r/4

33 / 50

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

a) V = M/Z

b) V = MY/I

c) V = dM/dx

d) V = Mdx

34 / 50

34. The impact tests are used to determine

a) ultimate crushing strength

b) toughness

c) ductility

d) tenacity

35 / 50

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

a) point load

b) static load

c) dynamic load

d) wind load

36 / 50

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

a) rectangle

b) triangle

c) parabola

d) cubic parabola

37 / 50

37. *The maximum BM produced in a simply supported beam having a span of 4 m and subjected to a UDL of 10 kN/m

a) 10 kN-m

b) 20 kN-m

c) 30 kN-m

d) 40 kN-m

38 / 50

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

a) elastic limit

b) ultimate stress

c) yield stress

d) breaking stress

39 / 50

39. The actual breaking stress of a ductile material from a tension test will be

a) greater than the ultimate strength

b) equal to the ultimate strength

c) equal to the nominal breaking stress

d) less than the ultimate strength but greater than the nominal breaking stress

40 / 50

40. According to Hook's law, which one is correct?

a) σ=E

b) σE=1

c) σ = Εε

d) all of the above

41 / 50

41. *Which of the following sections is the most efficient in carrying bending moments

a) rectangular section

b) circular section

c) I-section

d) T-section

42 / 50

42. Effective length of column fixed at one end and hinged at the other end is

a) 1/2

b) 1/√2

c) 1l

d) 1.25l

43 / 50

43. 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

44 / 50

44. In the case of an H section, the maximum shear stress will occur at

a) top fibers

b) neutral axis

c) bottom fibers

d) at the junction of web and flanges

45 / 50

45. An orthotropic material has

a) inelastic properties

b) non-homogeneous properties

c) the same properties in an orthogonal direction

d) different properties in three perpendicular directions

46 / 50

46. *Hooke's law holds good up to:

a) Yield point

b) Plastic limit

c) Elastic limit

d) Breaking point

47 / 50

47. 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

48 / 50

48. Shear strain is defined as

a) change in the angle between planes at right angles

b) distortion of fiber

c) change in angle between two angles

d) strain that normally occurs

49 / 50

49. *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:

a) P

b) P/2

c) P/4

d) P/8

50 / 50

50. 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

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