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. In rectangular column having cross section b X h, the core is

a) rectangle of lengths b/2 and h/2

b) square of lengths b/2

c) rhombus of lengths h/2

d) rhombus of diagonals b/3 and h/3

2 / 50

2. 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

3 / 50

3. *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

4 / 50

4. *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.

5 / 50

5. *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

6 / 50

6. *A truss is completely analyzed, when

a) the direct stress in all the members are found

b) all the external reaction components are determined

c) the equilibrium is satisfied

d) none of the above

7 / 50

7. An isotropic material has

a) elastic mass

b) homogeneous mass

c) elastoplastic mass

d) none of the above

8 / 50

8. 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

9 / 50

9. *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

10 / 50

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

a) deflection

b) stiffness

c) BM

d) bending stress

11 / 50

11. An orthotropic material has

a) inelastic properties

b) non-homogeneous properties

c) the same properties in an orthogonal direction

d) different properties in three perpendicular directions

12 / 50

12. 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

13 / 50

13. 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

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. How does Young's Modulus vary with an increase in temperature?

a) will increase

b) will not be affected

c) will decrease

d) impossible to predict

16 / 50

16. 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

17 / 50

17. *Tensile internal force tends to:

a) crush the member

b) elongate the member

c) shorten the member

d) smash the member

18 / 50

18. *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

19 / 50

19. *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

20 / 50

20. The moment of inertia of a triangular section b x h about the base is

a) bh^3/12

b) bh^3/18

c) bh^3/36

d) all of the above

21 / 50

21. *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

22 / 50

22. *Thrust is induced in the case of

a) vertical load

b) inclined load

c) vertical & inclined load

d) none of the above

23 / 50

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

a) cast iron

b) wrought iron

c) mild steel

d) bronze

24 / 50

24. *Compression members always tend to buckle in the direction of the

a) parallel to the axis of the load

b) perpendicular to the axis of the load

c) least radius of gyration

d) least cross-section

25 / 50

25. *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

26 / 50

26. The maximum bending moment caused by a moving load on a fixed-end beam occurs

a) at the support

b) under the load

c) at mid span

d) none of the above

27 / 50

27. 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

28 / 50

28. If a material has identical properties in all directions, it is said to be

a) homogeneous

b) isotropic

c) elastic

d) orthotropic

29 / 50

29. 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

30 / 50

30. 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

31 / 50

31. The ratio of elongations of a conical bar due to its own weight and that of a prismatic bar of the same length is

a) 1/6

b) 1/5

c) 1/4

d) 1/3

32 / 50

32. The maximum deflection in a cantilever beam carrying a uniformly distributed load (w) over spans is (Where L is span of beam, W is total load and EI is flexural rigidity)

a) 3WL^3 / 2EI

b) WL^3 / 8EI

c) WL^3 / 5EI

d) WL^3 / 3EI

33 / 50

33. *A simply supported beam as shown in the fig. carries 10 t of load. What will be the reaction at point B ?

a) 5t

b) 4.5 t

c) 4t

d) 3 t

34 / 50

34. A column that fails primarily due to direct stress is called

a) long column

b) short column

c) weak column

d) none of the above

35 / 50

35. *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

36 / 50

36. *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

37 / 50

37. The maximum deflection of a beam occurs at

a) zero shear force location

b) zero slope location

c) zero bending moment location

d) none of the above

38 / 50

38. *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

39 / 50

39. In the case of a simply supported beam subjected to UDL, the maximum shear force occurs at a point

a) support

b) centre

c) 1/3

d) none of the above

40 / 50

40. *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

41 / 50

41. 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

42 / 50

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

a) 1

b) 2

c) 4

43 / 50

43. If the length of a simply supported beam carrying a concentrated load at the center is doubled, the deflection at the center will become

a) two times

b) four times

c) eight times

d) sixteen times

44 / 50

44. *The slope of an elastic curve at the point of contraflexture

a) must be equal to zero

b) greater than zero

c) need not be equal to zero

d) none of the above

45 / 50

45. The limit of proportionality depends upon

a) area of cross-section

b) types of loading

c) types of material

d) none of the above

46 / 50

46. *A point where SF is zero, BM is

a) maximum

b) minimum

c) either maximum or minimum

d) none of the above

47 / 50

47. *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

48 / 50

48. Rate of change of bending moment is equal to

a) shear force

b) slope

c) deflection

d) none of the above

49 / 50

49. *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

50 / 50

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

a) column

b) strut

c) tie

d) tanchion

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