81. Cold working
82. A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is $$\tau $$. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be
83. The shock resistance of steel is increased by adding
84. While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as
85. At low temperatures (say 75°C) the notched bar impact value of steel
86. Which of the following statement is correct, for two shafts connected in parallel?
87. The value of stress concentration factor depends upon
88. Which is correct statement? Stress concentration in cyclic loading is
89. Stress concentration factor is defined as the ratio of
90. If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation
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