Their designs can often include the land surrounding these structures. They may also specialize in interior or renovation designs. Structural engineers study and test materials and methods of construction that will ensure that various structures will withstand the rigors of environment or their intended use. Electrical engineers design, develop, conduct research and supervise the production of electrical equipment. They usually specialize in one area of work such as, medical equipment, computers or generators.
Mechanical engineers design and test motors and machines that produce and use power.
Machines that produce power include internal combustion engines, jet and rocket engines, gas and steam turbines and nuclear reactors. Machines that use power include automobiles, air-conditioners, and machine tools such as lathes, presses and drills. Drafters are artists who prepare accurate drawings and plans, based on the specifications of engineers, architects and industrial designers, for engineering and manufacturing purposes.