strength of materials mechanical engineering MCQs – Page 3

Practise focused strength of materials mechanical engineering questions with marked answers for exam preparation and subject revision.

strength of materials mechanical engineering Mcqs

41. Which of the following materials is most elastic_________________?
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A. rubber

B. glass

C. steel

D. brass

E. plastic

42. The change in the unit volume of a material under tension with increase in its Poissons ratio will ________________?
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A. remain same

B. unpredictable

C. increase

D. decrease

E. increase initially and then decrease

43. The intensity of stress which causes unit strain is called_______________?
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A. modulus of elasticity

B. principal stress

C. unit stress

D. modulus of rigidity

E. bulk modulus

44. The elasticity of various materials is controlled by its___________________?
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A. stress at yield point

B. stress at elastic limit

C. proof stress

D. tensile stress

E. ultimate tensile stress

45. When two plates are butt together and riveted with cover plates with two rows of rivets, the joi;it is known as ___________________?
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A. lap point

B. double riveted double cover butt joint

C. single riveted double cover butt joint

D. butt joint

E. single riveted single cover butt joint

46. Rupture stress is________________?
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A. maximum stress

B. maximum load/original cross-sectional area

C. load at breaking point/neck area

D. load at breaking point/A

E. breaking stress

47. A non-yielding support implies that the_________________?
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A. support is frictionless

B. support holds member firmly

C. slope of the beam at the support is zero

D. none of the above

E. support can take any amount of reaction

48. The property of a material by virtue of which it can be beaten or rolled into plates is called _________________?
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A. ductility

B. malleability

C. elasticity

D. plasticity

E. reliability

49. Shear stress induced in a shaft subjected to tension will be__________________?
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A. uniform throughout

B. maximum at periphery and zero at center

C. none of the above

D. average value in center

E. maximum at center

50. Proof resilience per material is known as________________?
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A. toughness

B. modulus of resilience

C. impact energy

D. proof resilience

E. resilience

51. A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal__________________?
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A. metal is twice as dense as unknown fluid

B. density of metal cant be determined

C. metal is twice as dense as water

D. metal will float in water

E. none of the above

52. The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to__________________?
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A. Wsin(a + )

B. Wcos(a + )

C. Wtan(a-)

D. Wtan(a + )

E. W (sin a + cos ).

53. Percentage reduction of area in performing tensile test on cast iron may be of the order of__________________?
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A. 50%

B. 0%

C. 15%

D. 25%

E. 60%.

54. Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in_________________?
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A. none of the above

B. any one of the above

C. compression

D. tension

E. bearing

55. The C.G. of a solid hemisphere lies on the central radius 3r_________________?
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A. at distance from the plane base 3r

B. at distance from the plane base 3r

C. at distance from the plane base

D. at distance from the plane base or

E. at distance from the plane base 3r

56. The safe twisting moment for a compound shaft is equal to the _________________?
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A. minimum calculated value

B. mean value

C. maximum calculated value

D. none of the above

E. extreme value

57. True stress-strain curve for materials is plotted between__________________?
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A. load/instantaneous area and instantaneous area/original area

B. load/original cross-sectional area and change in length/original length

C. none of the above

D. load/instantaneous cross-sectional area original area and log

E. load/instantaneous cross-sectional area and change in length/original length

58. If a part is constrained to move and heated, it will develop ____________________?
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A. principal stress

B. compressive stress

C. tensile stress

D. no stress

E. shear stress

59. The property of a material which allows it to be drawn into a smaller section is called________________?
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A. drawabihty

B. malleability

C. plasticity

D. ductility

E. elasticity

60. Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one_______________?
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A. ellipse

B. hyperbola

C. parabola

D. none of the above

E. circle

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