71. True stress strain-curve for materials is plotted between
72. When the shear force diagram is a parabolic curve between two points, it indicates that there is a
73. When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a
74. A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then
75. The property of a material which allows it to be drawn into a smaller section is called
76. The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is
77. The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates and $${\sigma _{\text{t}}},\,\tau $$ and $${\sigma _{\text{c}}}$$ = Permissible tensile, shearing and crushing stresses respectively)
78. The torsional rigidity of a shaft is given by
79. When a shaft, is subjected to torsion, the shear stress induced in the shaft varies from
80. A thin spherical shell of diameter (d) and thickness (t) is subjected to an internal pressure (p). The stress in the shell material is
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