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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Certificate: Yes
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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. *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

3 / 50

3. 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

4 / 50

4. 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

5 / 50

5. The difference between SF values at any two sections will be equal to

a) the area of bending moment between the two sections

b) the difference between the slopes of the curve of the loading diagram at two sections

c) the ordinate of shear force diagram at one section plus the slope of the loading diagram multiplied by the distance between two sections

d) the area of the loading diagram between those two sections

6 / 50

6. *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

7 / 50

7. 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

8 / 50

8. *Tensile internal force tends to:

a) crush the member

b) elongate the member

c) shorten the member

d) smash the member

9 / 50

9. 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

10 / 50

10. The rate of change of shear force is called

a) BM

b) point load

c) intensity of load

d) slope

11 / 50

11. *Maximum bending moment occurs where

a) shear force is maximum

b) shear force is less than one

c) shear force changes sign

d) deflection is zero

12 / 50

12. Which of the following end conditions permits the displacement in any direction and also rotation

a) fixed end

b) hinge end

c) free end

d) roller end

13 / 50

13. The maximum number of transverse shear forces possible at one end of an element of a plane frame are

a) zero

b) one

c) two

d) three

14 / 50

14. *Load required to produce unit deflection is called

a) stiffness

b) ductility

c) elasticity

d) malleability

15 / 50

15. If the elasticity of the material is zero then the material is said to be

a) rigid

b) perfect

c) plastic

d) all of the above

16 / 50

16. 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

17 / 50

17. 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

18 / 50

18. "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

19 / 50

19. *The magnitude of a shear force at a distance of L/4 from either end of a simply supported beam with load P applied at midspan is equal to:

a) P

b) P/2

c) P/4

d) P/8

20 / 50

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

a) cast iron

b) wrought iron

c) mild steel

d) bronze

21 / 50

21. 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

22 / 50

22. 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

23 / 50

23. The beam strongest in flexure will have the maximum

a) moment of inertia

b) section modulus

c) area of cross-section

d) none of the above

24 / 50

24. The stress in the member subjected to a force is

a) continued deformation under sustained loading

b) load per unit area

c) the resistance offered by the material per unit area to a force

d) the strain per unit length

25 / 50

25. *The compression test is commonly used for testing

a) ductile materials

b) rubber

c) brittle materials

d) none of the above

26 / 50

26. What is tenacity?

a) ultimate strength in tension

b) ultimate strength in compression

c) ultimate shear strength

d) ultimate impact strength

27 / 50

27. The relation between deflection (y) and bending moment (M) is

a) M = EI(dy/dx)

b) M =-EI(d²y/dx²)

c) M = EI(d²y/dx]

d) none of the above

28 / 50

28. An isotropic material has

a) elastic mass

b) homogeneous mass

c) elastoplastic mass

d) none of the above

29 / 50

29. *Thrust is induced in the case of

a) vertical load

b) inclined load

c) vertical & inclined load

d) none of the above

30 / 50

30. *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

31 / 50

31. *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

32 / 50

32. The bending moment diagram for a cantilever beam subjected to a moment at the end of the beam would be

a) rectangle

b) triangle

c) parabola

d) cubic parabola

33 / 50

33. *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

34 / 50

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

a) 1

b) 2

c) 4

35 / 50

35. 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

36 / 50

36. 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

37 / 50

37. 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

38 / 50

38. 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

39 / 50

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

a) creep

b) fatigue

c) elasticity

d) plasticity

40 / 50

40. *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

41 / 50

41. 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

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. *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

44 / 50

44. 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

45 / 50

45. 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

46 / 50

46. 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

47 / 50

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

a) catenary

b) parabola

c) cubic parabola

d) arc of a circle

48 / 50

48. The difference between BM values at any two sections will be equal to

a) the area of SF diagram between those two sections

b) the area of loading diagram between the two sections

c) the area of loading diagram

d) the area of bending moment between the two sections

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. Rate of change of bending moment is equal to

a) shear force

b) slope

c) deflection

d) none of the above

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