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. 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

2 / 50

2. *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

3 / 50

3. 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

4 / 50

4. *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

5 / 50

5. The reaction at end A of the beam shown is

a) 9 kN

b) 3 kN

c) 18 kN

d) zero

6 / 50

6. The diagram showing the variation of BM along the span of the beam is called

a) BMD

b) SFD

c) thrust diagram

d) all of the above

7 / 50

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

a) column

b) strut

c) tie

d) tanchion

8 / 50

8. *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

9 / 50

9. *A diagram that shows the variation of axial force

a) BMD

b) SFD

c) thrust diagram

d) stress diagram

10 / 50

10. *Strut is a

a) horizontal member

b) vertical member

c) inclined member

d) compression member

11 / 50

11. 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

12 / 50

12. 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

13 / 50

13. The slope of the curve of B.M. diagram at any section will be equal to

a) the slope of loading at that section

b) the slope of shear force diagram at that section

c) the ordinate of shear force diagram at that section

d) the area of shear force diagram starting from any one end

14 / 50

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

a) deflection

b) stiffness

c) BM

d) bending stress

15 / 50

15. 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

16 / 50

16. *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

17 / 50

17. The ratio of the effective length of a column and the minimum radius of gyration of its cross-sectional area is known as

a) buckling factor

b) slenderness ratio

c) crippling factor

d) none of the above

18 / 50

18. *A beam is said to be loaded in pure bending when

a) Bending moment is constant

b) Bending moment is zero

c) Bending moment is changing linearly

d) Bending moment and shear force are changing linearly

19 / 50

19. Shape of the bending moment diagram for a simply supported beam having a point load at the center is

a) parabolic

b) square

c) rectangular

d) triangular

20 / 50

20. In a fixed beam, the points of contraflexure,

a) for a UDL load are 2

b) for a concentrated load are 2

c) for a moment applied load are 2

d) all of the above

21 / 50

21. *The shear force in a concrete beam is assumed to act

a) along the longitudinal axis

b) perpendicular to the longitudinal axis

c) on a plane normal to the longitudinal axis

d) vertically downward

22 / 50

22. *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

23 / 50

23. 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

24 / 50

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

a) malleability

b) ductility

c) plasticity

d) elasticity

25 / 50

25. *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

26 / 50

26. The ratio of moment of inertia of a square section to that of a circular section for a given depth is given by

a) <1

b) >1

c) 1

d) none of the above

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. *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

29 / 50

29. *Mathematically, strain may be defined as

a) the deformation per unit volume

b) the deformation per unit area

c) the deformation per unit length

d) all of the above

30 / 50

30. *The velocity of a moving body is:

a) A vector quantity

b) A scalar quantity

c) A constant quantity

d) None of the above

31 / 50

31. 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

32 / 50

32. A section of a beam is said to be in pure bending if it is subjected to

a) constant bending moment and constant shear force

b) constant bending moment and zero shear force

c) constant shear force and zero bending moment

d) none of the above

33 / 50

33. The region of c/s of a column in which compressive load may be applied without producing tensile load is known as

a) core

b) more

c) compression area

d) tension area

34 / 50

34. The limit of proportionality depends upon

a) area of cross-section

b) types of loading

c) types of material

d) none of the above

35 / 50

35. 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

36 / 50

36. *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

37 / 50

37. Point of contraflexure is a point where bending moment

a) minimum

b) maximum

c) zero

d) changes sign

38 / 50

38. The stress necessary to initiate yielding is considerably

a) more than necessary to continue it

b) less than necessary to continue it

c) more than necessary to stop it

d) less than necessary to stop it

39 / 50

39. 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

40 / 50

40. 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

41 / 50

41. 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

42 / 50

42. *The Young's Modulus of elasticity is defined as the ratio of stress & strain within the

a) plastic limit

b) all of the above

c) yield limit

d) elastic limit

43 / 50

43. 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

44 / 50

44. 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

45 / 50

45. 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

46 / 50

46. 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

47 / 50

47. *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

48 / 50

48. A body having similar properties throughout

a) homogeneous

b) isomorphic

c) isotropic

d) anisotropy

49 / 50

49. *A beam is said to be of uniform strength if

a) bending moment is the same throughout the beam

b) deflection is the same throughout the beam

c) bending stress is the same throughout the beam

d) none of the above

50 / 50

50. *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

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