SSC JE Mechanical 11 Oct 2023 Shift 2 Paper

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Question : 138 of 200
 
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 In a steam boiler, the actual evaporation is 8 kg of steam per kg of fuel burnt. The heat supplied per kg of water is 2500 kJ/kg. Higher calorific value of fuel is 25,000 kJ/kg. What is the boiler efficiency?
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