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a) %Excess air and Fuel Ratio [20 Marks] The Orsat flue gas analysis from a boiler house chimney by volume is provided as below If there is complete combustion takes place, Answer the following CO₂ = 12.5%; O₂-4.5%; N2=83% (i) Calculate the % Excess air (10 Marks) (ii) Calculate the C to H ratio in the fuel (10 Marks) Note: Carbon and Hydrogen gas fuel are used in boiler

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