Combustion Gas Analysis Quiz
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Questions and Answers

Which gas component is specifically measured in the flue gas analysis to determine combustion efficiency?

  • Carbon dioxide (CO2)
  • Oxygen (O2) (correct)
  • Carbon monoxide (CO)
  • Nitrogen (N2)

    • What is the primary purpose of stack emissions monitoring?

  • To analyze the products of combustion in the flue gas
  • To measure the various individual components of the flue gas
  • To determine the efficiency of the combustion process
  • To monitor the components emitted to atmosphere above certain limits (correct)

    • How are flue gas constituents typically listed?

  • By mole fraction
  • By parts per million (ppm)
  • By percent weight
  • By percent volume (correct)

    • According to Table 13, what is the trend between excess air and flue gas CO2 levels?

    <p>As excess air increases, flue gas CO2 levels decrease</p> Signup and view all the answers

    According to Example 23, what are the CO2 and O2 percentages in the flue gas of a coal-fired plant with excess air calculated at 60%?

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

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

    <p>Air(kg/kg of fuel) = (C + N2 + 2*O2 + S)/100</p> Signup and view all the answers

    According to Example 24, what is the percent of excess air used in a coal-fired boiler with the given fuel and flue gas analysis?

    <p>13%</p> Signup and view all the answers

    Which of the following is the correct conversion from percent by volume to parts per million (ppm)?

    <p>Multiply the percentage by 10,000</p> Signup and view all the answers

    What is the conversion of 0.01% CO to parts per million (ppm)?

    <p>100 ppm CO</p> Signup and view all the answers

    What is the conversion of 0.05% NO^2 to parts per million (ppm)?

    <p>500 ppm NO^2</p> Signup and view all the answers

    What is the conversion of 200 ppm NO^2 to percent by volume?

    <p>0.02% NO^2</p> Signup and view all the answers

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