ACTIVITIES MECHANICAL ENGINEERING MAJORS DO: Mechanical engineers design and develop power-producing machines, such as internal combustion engines, steam and gas turbines, and jet and rocket engines. They use computers not only to form preliminary designs for systems or devices, but also to perform calculations that will predict the behavior of the design and to collect and analyze performance data. Mechanical engineers also design and develop power-using machines, such as refrigeration and air-conditioning equipment, robots, machine tools, material handling systems, and industrial production equipment. Mechanical engineers design tools needed by other engineers to do their work. They combine practical and technical skills with analytical and intellectual pursuits, while valuing work that requires research and a high level of creativity. In addition, mechanical engineers may work in production operations in manufacturing or agriculture, maintenance, or technical sales. Many mecha