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. 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

2 / 50

2. Identify the correct relationship that exists among the modulus of elasticity (E), modulus of rigidity (N), and bulk modulus (k) is

a) E= 3K+N/9KN

b) E= 3KN/3K+N

c) E= 9KN/3K+N

d) E= K/N

3 / 50

3. 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

4 / 50

4. The stress due to temperature change in a member depends on

a) cross-section of the member

b) length of the member

c) supporting end conditions

d) none of the above

5 / 50

5. The equivalent length of column fixed at one end and free at the other end is

a) 2l

b) 0.75l

c) 1l

d) 1.25l

6 / 50

6. The value of Poisson's ratio always remains

a) greater than one

b) lesser than one

c) equal to one

d) none of these

7 / 50

7. The effective length of a column if both ends are hinged

a) L

b) 0.5L

c) 2L

d) 4L

8 / 50

8. The maximum number of transverse shear forces possible at one end of an element of a plane frame are

a) zero

b) one

c) two

d) three

9 / 50

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

a) malleability

b) ductility

c) plasticity

d) elasticity

10 / 50

10. *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

11 / 50

11. *The maximum bending moment in a simply supported beam UDL is applied

a) ends

b) mid

c) 1/2 distance

d) none of the above

12 / 50

12. *Centrifugal force is given by

a) v^2/R

b) mv^2/R

c) mxa

d) all of the above

13 / 50

13. *Stress may be defined as force

a) volume

b) length

c) area

d) none of the above

14 / 50

14. 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

15 / 50

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

a) deflection

b) stiffness

c) BM

d) bending stress

16 / 50

16. A perfectly elastic body is

a) that body which recovers its original shape completely after the removal of force

b) a body of such a material with a lot of extensibility

c) a body made of rubber only

d) a body whose cross-sectional dimensions are very small

17 / 50

17. *Which of the following gives Modulus of Elasticity

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

18 / 50

18. The maximum number of transverse shear forces possible at one end of an element of a plane truss are

a) zero

b) one

c) two

d) three

19 / 50

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

a) 1

b) 2

c) 3

d) 4

20 / 50

20. *The tension in a cable supporting a lift

a) is more when the lift is moving downwards

b) is less when the lift is moving upwards

c) Remains constant whether it moves downwards or upwards

d) is less when the lift is moving downwards

21 / 50

21. A brittle material will

a) fail suddenly

b) fail after giving warning

c) never fail

d) none of the above

22 / 50

22. *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

23 / 50

23. 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

24 / 50

24. Point of contraflexure is a point where bending moment

a) minimum

b) maximum

c) zero

d) changes sign

25 / 50

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

a) 1

b) 2

c) 3

d) 4

26 / 50

26. *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

27 / 50

27. *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

28 / 50

28. 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

29 / 50

29. 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

30 / 50

30. 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

31 / 50

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

a) 1l

b) 1.5 l

c) 2 l

d) 3 l

32 / 50

32. *"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

33 / 50

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

a) constant loads but occasionally well above static load

b) varying loads, well below ultimate static load

c) constant loads well below ultimate static load

d) varying loads well above ultimate static load

34 / 50

34. The rate of change of shear force is called

a) BM

b) point load

c) intensity of load

d) slope

35 / 50

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

a) incompressible

b) compressible

c) plastic

d) visco elastic

36 / 50

36. 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

37 / 50

37. 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

a) 232

b) 242

c) 252

d) 262

38 / 50

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

a) y

b) dy/dx

c) d²y/dx²

d) d^3y/dx²

39 / 50

39. A beam is supported over three rollers lying in the same plane. The beam is stable for

a) any general loading

b) loading with no component in the direction of the beam

c) loading with no component perpendicular to the direction of the beam

d) only when no load except self-weight acts.

40 / 50

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

a) WL^3 / 8EI

b) WL^3 / 48EI

c) 5WL^3 / 48EI

d) 5WL^3 / 384EI

41 / 50

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

a) two concentrated loads spaced at points

b) a couple at mid span

c) a uniformly distributed load

d) none of the above

42 / 50

42. *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

43 / 50

43. *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

44 / 50

44. *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

45 / 50

45. 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

46 / 50

46. 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)

a) WL^3 / 8EI

b) WL^2 / 5EI

c) WL^3 / 3EI

d) 3WL^3 / 2EI

47 / 50

47. *The phenomenon of decreased resistance of material due to the reversal of stress is called

a) creep

b) fatigue

c) elasticity

d) plasticity

48 / 50

48. The stress in the member subjected to a force is

a) continued deformation under sustained loading

b) load per unit area

c) the resistance offered by the material per unit area to a force

d) the strain per unit length

49 / 50

49. *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

50 / 50

50. 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

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