Question 18Steam Plants - Assistant Engineer70% to pass
Generally, a 12% to 14% content of carbon dioxide in boiler flue gases indicates _______________.
AI Explanation
The correct answer is B) proper combustion of the fuel oil.
The 12% to 14% content of carbon dioxide in boiler flue gases indicates that the combustion of the fuel oil is occurring properly. This range of CO2 content suggests that the fuel is being burned efficiently, with the right amount of air to achieve complete combustion without excessive excess air.
The other options are incorrect because: A) too much excess air would result in lower CO2 levels, C) high vanadium content does not directly affect the CO2 levels, and D) carbon deposits would not necessarily indicate the CO2 content in the flue gases.
Related Questions
#16 When testing boiler flue gas with a chemical absorption apparatus, to obtain accurate results _______________.#17 If an analysis of boiler flue gas determines there is no excess air for combustion, you should expect the nitrogen content of the flue gas to be approximately _______________.#19 Assuming all burners are clean and the fuel oil is at the correct temperature, it is considered good practice to adjust the excess air until a light brown haze is obtained. With the aid of a chemical based flue gas analyzer, the percentage readings (not necessarily in order) should indicate _______________.#20 Which of the following chemicals is used in an Orsat apparatus to absorb carbon dioxide? #21 When burning fuel oil in a boiler, a high CO2 content is desired in the stack gas because _______________.