One of the most important fuels these days is Jet Fuel. It is a middle distillate oil that is used for jets all around the world. It has some of the critical qualities such as freeze point, smoke point, flash point and more. It works when compressed air is prayed with this fuel and it leaves an electric spark that lights the mixture. The gas then expands and blast out through the nozzle at the backside of the engine. The engine and the aircraft moves forward with the backward movement of gas. Thus Jet Fuel is one of the essential fuels for air transport.