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A train is a form of rail transport ____________________ consists of a series of vehicles ____________________ usually run ____________________ a rail track to transport cargo or passengers . Motive power ____________________ ____________________ by a separate locomotive ____________________ individual motors in self - propelled multiple units . ____________________ historically steam propulsion dominated , the ____________________ common modern forms are diesel ____________________ electric locomotives , the latter supplied ____________________ overhead wires or ____________________ rails . Other energy sources for trains ____________________ horses , rope or wire , gravity , pneumatics , batteries , ____________________ gas turbines . Train tracks usually ____________________ of two , three or four or five rails , with a limited ____________________ of monorails and maglev guideways in the mix . The word 'train' comes ____________________ the Old French " trahiner " , and from the Latin " trahere " , ____________________ means ? pull , draw " .
There are ____________________ types of trains that ____________________ ____________________ for particular purposes . A train may consist ____________________ a combination of one or ____________________ locomotives and attached railroad cars . They may also have a self - propelled multiple unit which ____________________ ____________________ a railcar .
The first trains ____________________ ____________________ by a rope . Later , they ____________________ ____________________ by gravity , or pulled by horses . In the ____________________ 19th century , almost all trains ____________________ ____________________ by steam locomotives . From the 1910s ____________________ , the steam locomotives began to be replaced by ____________________ labor - intensive and cleaner diesel locomotives ____________________ electric locomotives which were ____________________ complex and expensive . ____________________ , those steam trains were more complex and expensive ____________________ the earlier trains .
A passenger train is a type of train ____________________ includes long vehichles that carry passengers . One popular long - distance train category is high - speed rail . ____________________ ____________________ ____________________ achieve much faster operation over 500 km / h ( 310 mph ) , innovative Maglev technology ____________________ ____________________ ____________________ for years . In most countries , ____________________ ____________________ the United Kingdom , the distinction ____________________ a tramway and a railway is precise and ____________________ in law . The term light rail ____________________ sometimes ____________________ ____________________ a modern tram system , but it may also ____________________ an intermediate form between a tram and a train , ____________________ ____________________ a subway except that it may have level crossings .
A freight train which ____________________ ____________________ ____________________ as goods train uses freight cars . Wagons or trucks are used to transport goods or materials ( cargo ) in these trains . A freight train ____________________ is speacially designed for cargo transportation ____________________ ____________________ ____________________ by passengers .