The work of an engineer is to develop solutions for technical problems while keeping its practicality and cost in mind. There are several categories of engineers and each of them performs their specific duties. Some of the common duties of an engineer are as follows. Engineers have to supervise the production in factories, resolve any breakdowns, test manufactured compound to ensure quality and provide an estimate of cost and time for different projects. Some engineers spend their time in creating new materials and machines, to enhance the efficiency of humans. Engineers also play their part in the construction industry as they create designs of buildings and bridges and then make sure that the plan is carried out effectively. Engineers have to get a four-year degree in a particular field of engineering and to get admission one has to have a high school diploma. There are many fields of engineering like civil engineering, automobile engineering, electrical engineering, mechanical engineering, bio medical engineering, nuclear engineering, chemical engineering and a few more. Different engineers get a different pay scale. One thing, which is very important to know to become an engineer, is that the field of engineering requires technical knowledge and deep interest in science subjects.