strength of materials mechanical engineering MCQs – Page 5

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

strength of materials mechanical engineering Mcqs
81. The impact strength of a material is an index of its ___________________?
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A. toughness

B. hardness

C. fatigue strength

D. tensile strength

E. capability of being cold worked

82. The internal reaction in bottom 80 cm length will be________________?
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A. same in both cases

B. zero in first case

C. different in both cases

D. data are not sufficient to determine same

E. none of the above

83. The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of __________________?
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A. friction

B. limiting friction

C. kinematic friction

D. static friction

E. repose
84. The energy absorbed in a body, when it is strained within the elastic limits, is known as________________?
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A. proof resilience

B. strain energy

C. modulus of resilience

D. resilience

E. toughness

85. For which material the Poissons ratio is more than unity_________________?
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A. copper

B. cast iron

C. aluminium

D. steel

E. none of the above
86. The value of Poissons ratio for cast iron is_________________?
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A. 0.1 to 0.2

B. 0.25 to 0.33

C. 0.23 to 0.27

D. 0.4 to 0.6

E. 3 to 4

87. A riveted joint in which every rivet of a row is opposite to other rivet of the outer row, is known as______________________?
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A. chain riveted joint

B. none of the above

C. criss-cross riveted joint

D. diamond riveted joint

E. zig-zag riveted joint

88. The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder; this stress is called___________________?
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A. yeiled stress

B. none of the above

C. longitudinal stress

D. hoop stress

E. ultimate stress

89. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly_______________?
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A. 62.5 m

B. 38 m

C. 124 m

D. 96 m

E. 240 m

90. A material capable of absorbing large amount of energy before fracture is known as________________?
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A. plasticity

B. ductility

C. resilience

D. shock proof

E. toughness
91. The percentage reduction in area of a cast iron specimen during tensile test would be of the order of_________________?
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A. 1025%

B. 510%

C. 2550%

D. negligible

E. more than 50%

92. A cable with a uniformly distributed load per horizontal metre run will take the following shape_________________?
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A. straight line

B. elliptical

C. hyperbola

D. part of a circle

E. parabola
93. A key is subjected to side pressure as well at shearing forces. These pressures are called_________________?
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A. none of the above

B. resultant stresses

C. crushing stresses

D. fatigue stresses

E. bearing stresses
94. Which of the following is the example of lever of first order__________________?
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A. arm of man

B. all of the above

C. none of the above

D. pair of clinical tongs

E. pair of scissors

95. When it is indicated that a member is elastic, it means that when force is applied, it will________________?
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A. none of the above

B. be safest

C. stretch

D. not stretch

E. not deform

96. The value of shear stress which is induced in the shaft due to the applied couple varies____________________?
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A. from maximum at the center to zero at the circumference

B. from zero at the center to maximum at the circumference

C. from maximum at the center to mini-mum at the cricumference

D. from minimum at the centro to maxi-mum at the circumference

E. none of the above

97. The total strain energy stored in a body is termed as__________________?
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A. resilience

B. modulus of resilience

C. proof resilience

D. toughness

E. impact energy

98. The stress developed in a material at breaking point in extension is called_________________?
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A. ultimate tensile stress

B. breaking stress

C. proof stress

D. fracture stress

E. yield point stress

99. The Youngs modulus of a wire is defined as the stress which will increase the length of wire compared to its original length________________?
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A. same amount

B. half

C. one-fourth

D. double

E. four times

100. For steel, the ultimate strength in shear as compared to in tension is nearly _________________?
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A. one-third

B. same

C. one-fourth

D. half

E. two-third