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 shear flow in a section can be defined as

a) total shear stress

b) flow direction of shear

c) total shear stress at a point

d) none of the above

2 / 50

2. 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

3 / 50

3. 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

4 / 50

4. The strain energy stored by a member when strained within the elastic limit is known as

a) resilience

b) proof resilience

c) potential strain

d) none of the above

5 / 50

5. 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

6 / 50

6. 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

7 / 50

7. 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.

8 / 50

8. A brittle material will

a) fail suddenly

b) fail after giving warning

c) never fail

d) none of the above

9 / 50

9. If the Poisson's ratio of a material is 0.25, the ratio of Modulus of Rigidity to the Young's Modulus is

a) 2

b) 0.4

c) 2.5

d) 4

10 / 50

10. 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

11 / 50

11. A cantilever beam of span 4m and carrying a point load of 10 kN located at 3m from the fixed end. Find the BM at the fixed and free end

a) 30 kN-m, 0

b) 30 kN-m, 10 kN-m

c) 10 kN-m, 30 kN-m

d) none of the above

12 / 50

12. *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

13 / 50

13. 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

14 / 50

14. 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

15 / 50

15. *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

16 / 50

16. 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

17 / 50

17. 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

18 / 50

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

a) L

b) 0.5L

c) 2L

d) 4L

19 / 50

19. The limit of proportionality depends upon

a) area of cross-section

b) types of loading

c) types of material

d) none of the above

20 / 50

20. The rate of change of shear force is called

a) BM

b) point load

c) intensity of load

d) slope

21 / 50

21. 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

22 / 50

22. 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

23 / 50

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

a) 9 kN

b) 3 kN

c) 18 kN

d) zero

24 / 50

24. 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

25 / 50

25. 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

26 / 50

26. *Young's modulus is the ratio of

a) Volumetric stress/volumetric strain

b) Lateral stress/lateral strain

c) Longitudinal stress/ longitudinal strain

d) Shear stress/ shear strain

27 / 50

27. 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

28 / 50

28. A member that is subjected to reversible tensile or compressible stress may fail at a stress lower than the ultimate stress of the material. The property of the metal is called

a) plasticity of the metal

b) elasticity of the metal

c) fatigue of the metal

d) workability of the metal

29 / 50

29. 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

30 / 50

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

a) σ=E

b) σE=1

c) σ = Εε

d) all of the above

31 / 50

31. *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

32 / 50

32. A cantilever beam is the one which is supported with

a) one end hinge and other on rollers

b) one end fixed and other on rollers

c) both ends on rollers

d) one end fixed and the other free

33 / 50

33. The algebraic sum of the shear flow of a section in any direction must be equal to

a) zero

b) net shear force

c) the shear force in that direction

d) none of the above

34 / 50

34. *The law which states that within elastic limits strain produced is proportional to stress producing it is known as:

a) Bernoulli's law

b) yield stress

c) Hooke's law

d) Poisson's law

35 / 50

35. *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

36 / 50

36. 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

37 / 50

37. 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

38 / 50

38. *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

39 / 50

39. *Load required to produce unit deflection is called

a) stiffness

b) ductility

c) elasticity

d) malleability

40 / 50

40. 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

41 / 50

41. 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

42 / 50

42. *"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

43 / 50

43. *The velocity of a moving body is:

a) A vector quantity

b) A scalar quantity

c) A constant quantity

d) None of the above

44 / 50

44. *The centre of gravity of a triangle is at the point where three

a) medians of the triangle meet

b) perpendicular bisectors of the sides of the triangle meet

c) bisectors of the angle of the triangle meet

d) none of these

45 / 50

45. *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

46 / 50

46. In an I section, almost all the shear force is taken by

a) top flange

b) web

c) bottom flange

d) none of the above

47 / 50

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

a) 2P

b) 4P

c) P/8

d) P/16

48 / 50

48. 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

49 / 50

49. The maximum bending moment caused by a moment M applied at a distance 'a' from one end on a simply supported beam is.... (where L=span, a>L/2)

a) M

b) Ma/L

c) M(L-a)/L

d) ML/a

50 / 50

50. Strain energy of a member may be defined as work done on it

a) to deform it

b) to resist elongation

c) to resist shortening

d) all of the above

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