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. 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

2 / 50

2. *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

3 / 50

3. Which of the following is a relatively ductile material?

a) cast iron

b) wrought iron

c) mild steel

d) bronze

4 / 50

4. *If the shear force along a section of a beam is zero, the bending moment at the section is:

a) zero

b) maximum

c) minimum

d) average of maximum-minimum

5 / 50

5. The radius of gyration of a rectangular section is not proportional to

a) the square root of the moment of inertia

b) the square root of the inverse of the area

c) the square root of the moment of inertia divided by the area of the section

d) none of the above

6 / 50

6. 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

7 / 50

7. *A member with a cross section of a mm^2 is subjected to a force of P N. It is L mm long and of Young's Modulus, E N/mm^2. The strain will be

a) PL/AE(n/mm)

b) PA/LE(N/mm^2)

c) P/AE(mm/mm)

d) AP/LE(mm/mm)

8 / 50

8. 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

9 / 50

9. 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

10 / 50

10. *"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

11 / 50

11. *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

12 / 50

12. *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

13 / 50

13. If a constant section is subjected to a uniform/ pure bending moment throughout, its length bends to

a) circular arc

b) parabolic arc

c) catenary

d) all of the above

14 / 50

14. 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

15 / 50

15. 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

16 / 50

16. 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

17 / 50

17. *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

18 / 50

18. A brittle material has

a) no plastic zone

b) no inelastic zone

c) a very little plastic zone

d) a large plastic zone

19 / 50

19. *The property of a material by which a body returns to its original shape after removal of the force is called

a) plasticity

b) elasticity

c) ductility

d) malleability

20 / 50

20. 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

21 / 50

21. *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

22 / 50

22. 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

23 / 50

23. *Bending moment diagram of a simply supported beam having a uniformly distributed load is

a) rectangular

b) parabolic

c) triangular

d) all of the above

24 / 50

24. 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

25 / 50

25. Find the maximum BM induced in a simply supported 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) 8 KN-m

b) 4 KN-m

c) 2 KN-m

d) 1 KN-m

26 / 50

26. *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

27 / 50

27. The square root of the ratio of moment of inertia and cross-section area of the member is known as

a) least lateral dimension

b) second moment of inertia

c) radius of gyration

d) section modulus

28 / 50

28. *The product EI is called

a) flexural rigidity

b) torsional rigidity

c) second moment of area

d) none of the above

29 / 50

29. The limit of proportionality depends upon

a) area of cross-section

b) types of loading

c) types of material

d) none of the above

30 / 50

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

a) 1

b) 2

c) 3

d) 4

31 / 50

31. *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

32 / 50

32. The rate of change of shear force is called

a) BM

b) point load

c) intensity of load

d) slope

33 / 50

33. *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

34 / 50

34. 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

35 / 50

35. 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

36 / 50

36. The crippling load for a column with both ends hinged is

a) πΕΙ/ L^2

b) π^2EI/4L^2

c) π^2EI/L^2

d) 4π^2EI/L^2

37 / 50

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

a) V = M/Z

b) V = MY/I

c) V = dM/dx

d) V = Mdx

38 / 50

38. *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

39 / 50

39. Maximum bending moment occurs at the center if the simply supported beam is subjected to

a) point load of center

b) uniformly distributed load throughout the span

c) triangular load with maximum intensity at the center

d) all of the above

40 / 50

40. 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

41 / 50

41. A Prismatic bar when subjected to pure bending assumes the shape of

a) catenary

b) parabola

c) cubic parabola

d) arc of a circle

42 / 50

42. Find the maximum SF 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) 30 kN

b) 7 kN

c) 3 kN

d) 10 kN

43 / 50

43. 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

44 / 50

44. *Toughness is

a) the ability to absorb energy during plastic deformation

b) higher ultimate strength

c) stress at field

d) strain energy at field

45 / 50

45. In a beam, the neutral plane

a) may be at its centre

b) passes through the c.g. of the area of c/s

c) does not change during deformation

d) none of the above

46 / 50

46. A cantilever beam is one which is:

a) Fixed at both ends

b) Fixed at one end and free at other end

c) Supported at its ends

d) Supported on more than two supports

47 / 50

47. A column that fails primarily due to buckling is known as

a) long column

b) short column

c) wear column

d) medium column.

48 / 50

48. The maximum bending moment caused on a simply supported beam subjected to two equal concentrated loads (W/2) spaced at an equal distance (L/3) over the span is

a) WL/8

b) WL/6

c) WL/4

d) WL/2

49 / 50

49. *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

50 / 50

50. The bending moment in a cable carrying a system of loads will be

a) zero at all point

b) minimum at the center

c) maximum at the center

d) none of the above

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