Mechanical Engineering is a profession that concerns itself with mechanical design, energy conversion, fuel and combustion technologies, heating, ventilating, and air conditioning (HVAC), refrigeration systems, fire-protection systems, heat transfer, materials, noise control and acoustics, manufacturing processes, rail transportation, automatic control, product safety and reliability, solar energy, and technological impacts to society.
Mechanical engineers study the behavior of materials when forces are applied to them, such as the motion of solids, liquids, gases, and heating and cooling of object and machines. Using these basic building blocks, mechanical engineers design vehicles, trains, airplanes, power plants, furnaces, cold storage plants, air-conditioning systems, intelligent machines, and robots.
Professionals who are in this area also work in various fields such as jet engine design, submarines, hot air balloons, textiles and new materials, medical and hospital equipment, refrigerators, and other home appliances. Anything that is mechanical or must interact with another machine or human being is within the broad scope of mechanical engineering.