Context: A steam locomotive is a railway locomotive that produces its pulling power through a steam engine. These locomotives are fueled by burning combustible materialusually coal/coke, wood, or oilto produce steam in a boiler. The steam moves reciprocating pistons which are mechanically connected to the locomotive's main wheels (drivers). Both fuel and water supplies are carried with the locomotive, either on the locomotive itself or in wagons (tenders) pulled behind.
The first steam locomotive, made by Richard Trevithick, first operated on 21 February 1804, three years after the road locomotive he made in 1801. The first practical steam locomotive was built in 1812-13 by John Blenkinsop., The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte, and came into use in the early twentieth century following a December 1900 editorial in "American Engineer and Railroad Journal". The notation counts the number of leading wheels, then the number of driving wheels, and finally the number of trailing wheels, groups of numbers being separated by dashes. Other classification schemes, like UIC classification and the French, Turkish and Swiss systems for steam locomotives, count axles rather than wheels., South America is a continent located in the western hemisphere, mostly in the southern hemisphere, with a relatively small portion in the northern hemisphere. It is also considered a subcontinent of the Americas, which is the model used in nations that speak Romance languages. The reference to South America instead of other regions (like Latin America or the Southern Cone) has increased in the last decades due to changing geopolitical dynamics (in particular, the rise of Brazil)., Richard Trevithick (13 April 1771  22 April 1833) was a British inventor and mining engineer from Cornwall, England. The son of a mining captain, and born in the mining heartland of Cornwall, Trevithick was immersed in mining and engineering from an early age. He performed poorly in school, but went on to be an early pioneer of steam-powered road and rail transport. His most significant contribution was the development of the first high-pressure steam engine. He also built the first full-scale working railway steam locomotive. On 21 February 1804 the world's first locomotive-hauled railway journey took place as Trevithick's unnamed steam locomotive hauled a train along the tramway of the Penydarren Ironworks, in Merthyr Tydfil, Wales., John Blenkinsop (1783  22 January 1831) was an English mining engineer and an inventor of steam locomotives, who designed the first practical railway locomotive., Robert Stephenson FRS (16 October 1803  12 October 1859) was an early railway and civil engineer. The only son of George Stephenson, the "Father of Railways", he built on the achievements of his father. Robert has been called the greatest engineer of the 19th century., John Bloomfield Jervis (December 14, 1795  January 12, 1885) was an American civil engineer. America's leading consulting engineer of the antebellum era (182060), Jervis designed and supervised the construction of five of America's earliest railroads, was chief engineer of three major canal projects, designed the first locomotive to run in America, designed and built the 41-mile Croton Aqueduct  New York City's fresh water supply from 1842 to 1891  and was a consulting engineer for the Boston water system., Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels on two axles, two powered driving wheels on one axle and no trailing wheels. This type of locomotive is often called a Jervis type, the name of the original designer.
Overview.
The wheel arrangement type was common on United States railroads from the 1830s through the 1850s. The first to be built was the "Experiment", later named "Brother Jonathan", for the Mohawk and Hudson Railroad in 1832. It was built by the West Point Foundry based on a design by John B. Jervis. Having little else to reference, the manufacturers patterned the boiler and valve gear after locomotives built by Robert Stephenson of England. A few examples of Stephenson locomotives were already in operation in America, so engineers did not have to travel too far to get their initial ideas., The Norris Locomotive Works was a steam locomotive manufacturing company based in Philadelphia, Pennsylvania, that produced nearly one thousand railroad engines between 1832 and 1866. It was the dominant American locomotive producer during most of that period, as well as the first major exporter of American locomotives, selling its popular 4-2-0 engines to railways in Europe and building the first locomotive used in South America., William Norris ( July 2 , 1802 -- January 5 , 1867 ) was an American steam locomotive builder . He founded the Norris Locomotive Works and through this company pioneered the use of the 4 - 2 - 0 ( the Norris type ) locomotive type in America during the 1840s ., On a steam locomotive, a trailing wheel or trailing axle is generally an unpowered wheel or axle (wheelset) located behind the driving wheels. The axle of the trailing wheels is usually located in a trailing truck. On some large locomotives, a booster engine was mounted on the trailing truck to provide extra tractive effort when starting a heavy train and at low speeds on gradients., Engineers design materials, structures, and systems while considering the limitations imposed by practicality, regulation, safety, and cost. The word "engineer ("from the Latin "ingeniator"")" is derived from the Latin words "ingeniare" ("to contrive, devise") and "ingenium" ("cleverness"). The foundation education of an engineer is typically a 4-year bachelor's degree or in some countries, a master's degree in an engineering discipline plus 46 years peer-reviewed professional practice culminating in a project report or thesis. Engineers who seek a professional engineer license in N. America will be required to take further exams in ethics, law and professional practice., Subject: william norris , Relation: occupation, Options: (A) count (B) designer (C) engineer (D) extra (E) inventor (F) major (G) mining engineer (H) model (I) pioneer (J) producer (K) travel
Output: engineer