The excavator and its utility The exactor is a device that is mostly used in bridge construction and real estate. It is used by the archaeological department and mining department of the Government. The excavator is also used to clean the sufficient quantity of dirt with a shortest time. It has 360 degrees movement and the operator seat is called pivoting cab. The pivoting cab is built in such a manner that the operation can operate this big instrument with extreme comfort. It has a big trunk and bucket to excavate and carry and throw the soil easily. The bulldozer and its use The bulldozer is a huge earth moving machine that helps to level the grounds. It is especially extremely useful in the road construction as it levels the surface. This is a heavy construction instrument with the same component as excavator with backhoe loader. The bulldozer is equipped with the blade in front that helps make the surface parallel. The blade of the bulldozer is operated by the help of hydraulic force. This big machine is used to push the piles of earth and make the ground more levelled. The dumpers and its usefulness The dump truck is also a heavy device that carries the huge quantity of earth from one place to another. It saves a lot of time while unloading the soils, muds and other substances. The dumper is one of the popular earth moving machines that are most seen in construction area. It is also extensively used in mining activities. The coal mining and rock breaking industries are always equipped with dump trucks which help to save money, manpower as well as time. This heavy machine is operated by the help of a driver with the pressure of hydraulic force. The crane and its usability The crane is an instrument that carries heavy objects from one place to another. It is a multipurpose machine that can be told a boon to the world. The crane is often found in the construction area such as; road, bridge and skyscrapers etc. Moreover, it is also extremely useful in accidental phenomena, since, it carries the broken train buggies, lorry, truck, bus and cars etc. which is almost impossible in case of human being. The crane was invented in Greece in the early times. However, it still remained confined with the human involvement. The crane in modern world is highly equipped with modern technology and is highly capable. There are many such earth moving machines that have been proved to be a boon for the world.