This free online maintaining and servicing home appliances course will introduce you to a wide variety of home applications, their usage, and how of light fittings, the part of the light which is attached to the wall or ceiling, as well teaching you about the different types of water purifiers, heating and air appliances, grinders, and mixers, Uninterruptible Power Supplies(UPS), series and shunt voltage regulators, and a whole lot more.