Question 83Steam Plants - 1st Asst/Chief70% to pass
The absence of carbon monoxide in the flue gas of a boiler indicates _______________.
AI Explanation
The correct answer is B) efficient combustion.
The absence of carbon monoxide (CO) in the flue gas of a boiler indicates that the combustion process is efficient, meaning the fuel is being burned completely with the proper air-to-fuel ratio. When combustion is efficient, the fuel is fully oxidized, and CO is not present in the exhaust. This is the desired outcome, as the presence of CO would indicate incomplete combustion and potential safety/efficiency issues.
The other answer choices are incorrect because: A) low carbon content of fuel would not necessarily lead to the absence of CO; C) insufficient air would actually cause incomplete combustion and the presence of CO; and D) contaminated fuel oil would more likely result in the presence of CO, not its absence.
Related Questions
#81 A mechanical carbon dioxide recorder operates by detecting the difference between air and the _______________.#82 Generally, a 12% to 14% content of carbon dioxide in boiler flue gases indicates _______________.#84 A flue gas analysis is performed to determine the _______________.#85 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 _______________.#86 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 _______________.