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. A brittle material has

a) no plastic zone

b) no inelastic zone

c) a very little plastic zone

d) a large plastic zone

2 / 50

2. *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.

3 / 50

3. 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

4 / 50

4. 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

5 / 50

5. A brittle material will

a) fail suddenly

b) fail after giving warning

c) never fail

d) none of the above

6 / 50

6. *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

7 / 50

7. 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

8 / 50

8. 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

9 / 50

9. *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

10 / 50

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

a) 1

b) 2

c) 3

d) 4

11 / 50

11. 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

12 / 50

12. *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

13 / 50

13. 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

a) zero

b) infinite

c) maximum

d) minimum

14 / 50

14. 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

15 / 50

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

a) 1

b) 2

c) 4

16 / 50

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

a) compressive stress

b) tensile stress

c) shear stress

d) longitudinal stress

17 / 50

17. 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

18 / 50

18. *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

19 / 50

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

a) creep

b) fatigue

c) elasticity

d) plasticity

20 / 50

20. *Maximum deflection of a simply supported beam subjected to concentrated load (w) at the mid-point is

a) wL^3 / 8EI

b) wL^3 / 48EI

c) 5wL^3 / 48EI

d) none of the above

21 / 50

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

a) maximum

b) zero

c) minimum

d) no relation

22 / 50

22. The limit of proportionality depends upon

a) area of cross-section

b) types of loading

c) types of material

d) none of the above

23 / 50

23. Find the maximum BM induced in a cantilever beam subjected to a point load of 10 KN and a length of the beam is 10 m. The load is located at a distance of 3 m from the free end:-

a) 40 kN-m

b) 50 kN-m

c) 60 kN-m

d) 70 kN-m

24 / 50

24. 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

25 / 50

25. 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

26 / 50

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

a) malleability

b) ductility

c) plasticity

d) elasticity

27 / 50

27. *"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

28 / 50

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

a) 2P

b) 4P

c) P/8

d) P/16

29 / 50

29. Find the elongation of a bar if c/s area of the bar is A, length 1, applied load p, modulus of elasticity of material is E

a) PI/AE

b) AE/PI

c) PA/IE

d) PE/AI

30 / 50

30. *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

31 / 50

31. *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

32 / 50

32. In a continuous beam, the point where bending moment changes sign is called

a) point of inflection

b) point of virtual hinge

c) point of contraflexure

d) all of the above

33 / 50

33. What is tenacity?

a) ultimate strength in tension

b) ultimate strength in compression

c) ultimate shear strength

d) ultimate impact strength

34 / 50

34. 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

35 / 50

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

a) top layer

b) bottom layer

c) neutral axis

d) every cross section

36 / 50

36. 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

37 / 50

37. 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

38 / 50

38. *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

39 / 50

39. The shear force on a beam is proportional to

a) curvature of the axis

b) displacement of the axis

c) sum of the forces

d) sum of the transverse forces

40 / 50

40. *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

41 / 50

41. 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

42 / 50

42. 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

43 / 50

43. *"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

44 / 50

44. 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

45 / 50

45. *A cable subjected to U.D.L. over its entire span assumes a shape of

a) semi-circle

b) an isosceles triangle

c) parabola

d) none of the above

46 / 50

46. The maximum bending moment in a simply supported beam loaded with a UDL of w/m having span l is

a) wl^2/2

b) wl^2/4

c) wl^2/8

d) wl^2/16

47 / 50

47. *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

48 / 50

48. 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

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 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

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