4. When a rectangular bar of length l, breadth b and thickness t is subjected to an axial pull of P, then linear strain (?) is given by (where E = Modulus of elasticity)
5. Two closely-coiled helical springs 'A' and 'B' of the same matenal, same number of turns and made from same wire are subjected to an axial load W. The mean diameter of spring 'A' is double the mean diameter of spring 'B'. The ratio of deflections in spring 'B' to spring 'A' will be
9. The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and ?t = Allowable tensile stress for weld metal)
10. A thin cylindrical shell of diameter (d) length (l) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is
