Podcast
Questions and Answers
Which of the following is true about nitrogen oxides (NOx)?
Which of the following is true about nitrogen oxides (NOx)?
- NOx is primarily composed of nitrogen trioxide (NO3)
- NOx is primarily composed of nitrogen pentoxide (N2O5)
- NOx is primarily composed of nitrogen dioxide (NO2) (correct)
- NOx is primarily composed of nitrogen monoxide (NO)
What are the sources of nitrogen in NOx?
What are the sources of nitrogen in NOx?
- Atmospheric air and fuels (correct)
- Atmospheric air only
- Combustion temperature
- Fuels only
Which type of nitrogen oxide is predominantly formed when natural gas or fuels with low nitrogen content are burned?
Which type of nitrogen oxide is predominantly formed when natural gas or fuels with low nitrogen content are burned?
- Nitrogen trioxide (NO3)
- Fuel NOx
- Prompt NOx
- Thermal NOx (correct)
Which type of device measures the decrease in light intensity due to absorption and scattering?
Which type of device measures the decrease in light intensity due to absorption and scattering?
N0^; emissions consist primarily of which compounds?
N0^; emissions consist primarily of which compounds?
Explain one method used to control sulfur dioxide and nitrogen oxides emissions.
Explain one method used to control sulfur dioxide and nitrogen oxides emissions.
Which formula is used to calculate the pressure of a gas?
Which formula is used to calculate the pressure of a gas?
What is the formula mass for sulfur dioxide ($SO_2$)?
What is the formula mass for sulfur dioxide ($SO_2$)?
What is the mass of 5 kmol of carbon dioxide ($CO_2$)?
What is the mass of 5 kmol of carbon dioxide ($CO_2$)?
Which type of analysis gives exact percentages of each substance that makes up a sample of coal?
Which type of analysis gives exact percentages of each substance that makes up a sample of coal?
Which of the following is a highly efficient method to remove NOx from exhaust gases?
Which of the following is a highly efficient method to remove NOx from exhaust gases?
What is the temperature range in which selective catalytic reduction (SCR) can be used?
What is the temperature range in which selective catalytic reduction (SCR) can be used?
Which of the following is NOT a catalyst used in selective catalytic reduction (SCR)?
Which of the following is NOT a catalyst used in selective catalytic reduction (SCR)?
What is the maximum reduction of NOx that can be achieved by selective catalytic reduction (SCR)?
What is the maximum reduction of NOx that can be achieved by selective catalytic reduction (SCR)?
Which of the following methods is NOT used to control particulates in flue gas emissions?
Which of the following methods is NOT used to control particulates in flue gas emissions?
What is the maximum percentage of ash content that can become fly ash and leave with the flue gases in a cyclone furnace?
What is the maximum percentage of ash content that can become fly ash and leave with the flue gases in a cyclone furnace?
Which type of continuous monitoring analyzer is located directly within the flue gas path?
Which type of continuous monitoring analyzer is located directly within the flue gas path?
How is particulate matter measured using an in situ transmissometer analyzer?
How is particulate matter measured using an in situ transmissometer analyzer?
- Which method is used to reduce NOx in applications where furnace residence time exceeds one second and combustion NOx levels are relatively high?
- Which method is used to reduce NOx in applications where furnace residence time exceeds one second and combustion NOx levels are relatively high?
- What is the temperature range within which selective non-catalytic reduction (SNCR) is most effective?
- What is the temperature range within which selective non-catalytic reduction (SNCR) is most effective?
- Which of the following is NOT a method used to control NOx in the combustion process?
- Which of the following is NOT a method used to control NOx in the combustion process?
- What is the maximum percentage by which selective non-catalytic reduction (SNCR) can reduce NOx?
- What is the maximum percentage by which selective non-catalytic reduction (SNCR) can reduce NOx?
