Some Interview Questions:- 1. What causes white smoke in two - TopicsExpress



          

Some Interview Questions:- 1. What causes white smoke in two stroke locomotive engines? Ans: That is the engine running too lean (lack of fuel). This condition will lead to overheating and failure of the engine. 2. What is the role of nitrogen in welding? Ans: Nitrogen is used to prevent porosity in the welding member by preventing oxygen and air from entering the molten metal during the welding process. Other gases are also used for this purpose such as Argon, Helium, Carbon Dioxide, and the gases given off when the flux burns away during SMAW (stick) welding. 3. What does Green field project mean? Ans: Green field projects are those projects, which do not create any environmental nuisance (pollution), follows environmental management system and EIA (environment impact assessment). These projects are usually of big magnitude. 4. How does iron ore turn into steel? Ans: To make Steel, Iron Ore is refined into iron and all the carbon is burned away using very high heat (Bessemer). A percentage of Carbon (and other trace elements) are added back to make steel.
Posted on: Sun, 17 Aug 2014 03:48:32 +0000

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