Combustion Gas Analysis Quiz
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Questions and Answers

Which components of the flue gas are measured in a combustion gas analysis?

  • Nitrogen (N0^)
  • Airborne pollutants
  • Oxygen (Oy), carbon monoxide (CO), and carbon dioxide (COy) (correct)
  • Particulates, SO-^, and mercury
  • What is the primary purpose of a flue gas analysis?

  • To measure the components emitted to atmosphere
  • To determine the individual components of the gas
  • To monitor stack emissions
  • To analyze the efficiency and completeness of the combustion process (correct)
  • What unit is commonly used to measure smaller concentrations, such as airborne pollutants, in flue gas analysis?

  • Kilogram
  • Mole
  • Parts per million (ppm) (correct)
  • Percent volume
  • Which gas is the product of complete combustion?

    <p>Carbon dioxide (CO2)</p> Signup and view all the answers

    What does the presence of carbon monoxide (CO) in the flue gas indicate?

    <p>The furnace is starved of air</p> Signup and view all the answers

    What is the reading in percent by volume for a flue gas sample containing 500 ppm NO2?

    <p>0.05%</p> Signup and view all the answers

    What is the reading in parts per million (ppm) for a flue gas sample containing 0.02% NO2?

    <p>200 ppm</p> Signup and view all the answers

    According to the information provided, what is the trend observed in Table 13 regarding the flue gas CO2 and O2 percentages as the excess air increases?

    <p>The flue gas CO2 increases and the flue gas O2 decreases.</p> Signup and view all the answers

    Based on the given data, what are the CO2 and O2 percentages by volume for a coal-fired plant with excess air calculated at 60%?

    <p>CO2 = 11.3% and O2 = 8%</p> Signup and view all the answers

    According to the formulas provided, how is the theoretical (stoichiometric) air required to burn fuel calculated?

    <p>Air(kg/kg of fuel) = (C + S + N3 + O2)</p> Signup and view all the answers

    Based on the given data, what is the percent of excess air used in the coal-fired boiler that uses coal with an analysis by mass of C = 78%, N2 = 6%, O2 = 3%, and non-combustibles = 13%, and a flue gas sample with the following volume analysis: O2 = 7.8%, CO = 0.2%, 002 = 10.4%, and N2 = 81.6%?

    <p>37.5%</p> Signup and view all the answers

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