Podcast
Questions and Answers
Which of the following is the primary component of nitrogen oxides (NOx) produced during combustion?
Which of the following is the primary component of nitrogen oxides (NOx) produced during combustion?
- Nitrogen trioxide (NO3)
- Nitrogen monoxide (NO) (correct)
- Nitrogen dioxide (NO2)
- Nitrogen pentoxide (NO5)
What is the predominant form of nitrogen oxides (NOx) when burning natural gas or fuels with low nitrogen content?
What is the predominant form of nitrogen oxides (NOx) when burning natural gas or fuels with low nitrogen content?
- Thermal NOx (correct)
- Prompt NOx
- Fuel NOx
- Nitrogen pentoxide (NO5)
Which of the following factors does NOT influence the formation of nitrogen oxides (NOx) during combustion?
Which of the following factors does NOT influence the formation of nitrogen oxides (NOx) during combustion?
- Time for reaction
- Amounts of nitrogen and oxygen available
- Temperature
- Fuel volatility (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 type of fuel can have an ash content ranging from 5% to 30%?
Which type of fuel can have an ash content ranging from 5% to 30%?
What is the maximum percentage of ash content that becomes fly ash in a fluidized bed furnace?
What is the maximum percentage of ash content that becomes fly ash in a fluidized bed furnace?
Which method of controlling particulates uses centrifugal force to remove larger particles from the flue gas?
Which method of controlling particulates uses centrifugal force to remove larger particles from the flue gas?
What is the efficiency of baghouse filters in the removal of particulate matter?
What is the efficiency of baghouse filters in the removal of particulate matter?
Which of the following is the most efficient method to remove NOx from exhaust gases?
Which of the following is the most 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?
What is the major component of acid rain?
What is the major component of acid rain?
What is the best control method for sulfur dioxide (SO2) emissions?
What is the best control method for sulfur dioxide (SO2) emissions?
Which process is used for the non-catalytic control of nitrogen oxides (NOx)?
Which process is used for the non-catalytic control of nitrogen oxides (NOx)?
What is the temperature range for selective non-catalytic reduction (SNCR)?
What is the temperature range for selective non-catalytic reduction (SNCR)?
Which method of NOx control is not generally used in boilers that have high turndown capabilities and modulate or cycle frequently?
Which method of NOx control is not generally used in boilers that have high turndown capabilities and modulate or cycle frequently?
What is the reduction reaction for the catalytic and non-catalytic removal of NOx?
What is the reduction reaction for the catalytic and non-catalytic removal of NOx?
Which of the following is the formula mass for sulfur dioxide ($SO_2$)?
Which of the following 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 ($CO_2$)?
For complete combustion of 24 kg of carbon (C), what mass of oxygen ($O_2$) is required?
For complete combustion of 24 kg of carbon (C), what mass of oxygen ($O_2$) is required?
A burner takes 20 kg/min excess air. If the theoretical air is 60 kg/min, what is the percent of excess air?
A burner takes 20 kg/min excess air. If the theoretical air is 60 kg/min, what is the percent of excess air?
