Question 14Steam Plants - Assistant Engineer

The correct answer is D) correct fuel/air ratio for efficient combustion. A flue gas analysis is used to determine the composition of the exhaust gases from a combustion process, which can be used to assess the fuel/air ratio and optimize the efficiency of the combustion. By analyzing the percentages of various gases like carbon dioxide, carbon monoxide, and oxygen in the flue gas, the operator can adjust the fuel and air supply to achieve the ideal fuel/air ratio for complete and efficient combustion. The other answer choices are incorrect because they do not directly relate to the purpose of a flue gas analysis. The specific heat of the combustion products (A), the percentage of nitrogen (B), and the carbon content of the fuel (C) are not the primary objectives of a flue gas analysis, which is focused on optimizing the combustion process.