(a). A rod is subjected to a tensile load of 20KN and a shear load of 15KN. The material has a yield stress of 400MPa. Taking the factor of safety as 2, determine the diameter of the rod according to the following theories of failure; (i). Maximum normal stress theory (6mks) (ii). Maximum shear stress theory (6mks) (iii). Maximum distortion energy theory (6mks) (b). A medium force fit on a 45 mm shaft requires a hole tolerance and shaft tolerance each equal to 0.0825 mm and average interference of 0.0275 mm. Find the hole and shaft dimensions (7mks)