The common consensus is that the hardest engineering degrees are mechanical and aerospace with chemical, electrical, and computer.
In the general case, senior design. One specific case (for electrical/computer engineering): Is mechanical engineering really the toughest among other branches of engineering? In a undergraduate curriculum, transport phenomena makes heavy use of linear partial differential equations, a number of which can be.
What course of college study was labeled 'the toughest ' by the all the courses including MBBS, BCOM, IAS, IPS and ENGINEERING by the Missing: automotive.