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50-Most frequently asked Questions Answers on Bearings

1-Define the term Bearing A bearing is a machine element which reduces friction between two members, having relative motion with respect to each other. It’s a device used to support and guide rotating, oscillating or sliding shaft. 2-What are the functions of bearings? Supports & guides the rotating parts Reduces the friction & hence no or less wear & tear in moving parts Reduces the noise Reduces the lubricants consumption Reduces the power consumption of an equipment where it is being used Its all about HP heaters 3-Where do you find the application of bearings? Bearings found applications in almost all type of industries from a small trimmer to big & big Machines. 4-What type of loads act on bearings? Bearings can take in both axial, radial directions with small misalignment What are the main types of bearings used in industries? Main types of bearings are Journal bearing & Rolling contact bearings 5-Briefly explain the Journal be

Questions answers & calculation on Boiler draught & Chimney

1-What do you mean by the term draught? It is the pressure difference, which causes flow of gases to take places. 2-What is the function of draught in Boiler? To supply the combustion air required for proper combustion To evacuate the combustion products from the furnace or combustion chamber To evacuate the combustion products to the atmosphere So draught is the pressure difference between the inside the boiler and outside air. Inside the boiler pressure is due to combustion products (Flue gas) & outside pressure is due to fresh atmospheric air. 3-What are the different types of draughts used in power plant boilers? There are mainly two types of draughts. Natural draught & artificial draught Natural draught is generally obtained by Chimney Artificial draughts have main two types Steam jet: It is again classified into Induced & forced draught Mechanical draught: This is classified into Induced draught, forced draught & Natural draught