a) Write relation between stress \& strair in machine members. b) List the methods to account for stress concentration in the design of machine parts. c) What are the different types of stresses to which a bolt is subjected? Give a schematic representation. d) Differentiate between axle and shat in terms of the usage, forces and the stresses developed in them. )) List the practical applications of couplings. What is nipping in a leaf spring? Discuss its role. List the materials commonly used for the manufacture of the leaf springs