Question 84Steam Plants - 1st Asst/Chief

The correct answer is D) correct fuel/air ratio for efficient combustion. A flue gas analysis is used to determine the proper fuel/air ratio for efficient combustion in boilers, engines, and other combustion equipment. By analyzing the composition of the exhaust or flue gas, the operator can adjust the air intake to achieve the ideal fuel/air mixture 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. Option A measures the nitrogen content, option B measures the carbon content of the fuel, and option C measures the specific heat of the combustion products, none of which are the primary goals of a flue gas analysis.