Power transmission is the movement of energy from its place of generation to a location where it is applied to perform useful work. Power is defined formally as units of energy per unit time. The power is transmitted from one shaft to the other by means of belts, chains and gears. The belts and ropes are flexible members which are used where the distance between the two shafts is large. A fan belt is one of the essential car parts that need regular maintenance. It is a flexible rubber belt that puts together certain engine components. A belt is a single, continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, air conditioning compressor and or air pump.