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Questions and Answers
Which equation represents the air-fuel ratio (AF)?
Which equation represents the air-fuel ratio (AF)?
- AF = mass of fuel / mass of air
- AF = mass of fuel / mass of combustion air
- AF = mass of combustion air / mass of fuel (correct)
- AF = mass of air / mass of fuel
What is the theoretical air-fuel ratio for the perfect combustion of methane (CH4)?
What is the theoretical air-fuel ratio for the perfect combustion of methane (CH4)?
- 17.2 (correct)
- 12.324
- 2.054
- 20.64
If the air-fuel ratio for methane combustion in a particular boiler is 20.64, what is the excess air supplied?
If the air-fuel ratio for methane combustion in a particular boiler is 20.64, what is the excess air supplied?
- 10.27 kg/kg fuel
- 20%
- 124
- 3.44% (correct)
What is the total air required to operate the furnace, given that the excess air is 2.054 kg/kg fuel and the theoretical air is 10.27 kg/kg fuel?
What is the total air required to operate the furnace, given that the excess air is 2.054 kg/kg fuel and the theoretical air is 10.27 kg/kg fuel?
Which of the following effects may occur if there is too much excess air in combustion?
Which of the following effects may occur if there is too much excess air in combustion?
What are the effects of not having enough excess air in combustion?
What are the effects of not having enough excess air in combustion?
What is the formula for calculating the mass of air required to supply a specific quantity of oxygen for combustion?
What is the formula for calculating the mass of air required to supply a specific quantity of oxygen for combustion?
What is the mass of air required for the complete combustion of 1 kg of carbon?
What is the mass of air required for the complete combustion of 1 kg of carbon?
Which of the following is the correct equation for calculating the mass of air required for the combustion of hydrogen?
Which of the following is the correct equation for calculating the mass of air required for the combustion of hydrogen?
What is the mass of air required for the combustion of 1 kg of hydrogen?
What is the mass of air required for the combustion of 1 kg of hydrogen?
What is the equation for calculating the theoretical air required for the combustion of carbon, hydrogen, and sulfur?
What is the equation for calculating the theoretical air required for the combustion of carbon, hydrogen, and sulfur?
If the safe operation of a furnace requires 20% excess air and the theoretical air required is 10.27 kg per kg of fuel, what is the excess air in kg/kg fuel?
If the safe operation of a furnace requires 20% excess air and the theoretical air required is 10.27 kg per kg of fuel, what is the excess air in kg/kg fuel?
Excess air is the amount of air supplied to a combustion process in addition to the theoretical air required for perfect combustion. The amounts of excess and theoretical air are usually expressed as mass (kg of air/kg of fuel) but can also be expressed as volumes or kilomoles.
Excess air is the amount of air supplied to a combustion process in addition to the theoretical air required for perfect combustion. The amounts of excess and theoretical air are usually expressed as mass (kg of air/kg of fuel) but can also be expressed as volumes or kilomoles.
If the theoretical air required for the complete combustion of 1 kg of fuel is 10 kg, but the actual air supplied is 15 kg, what is the excess air as a percentage?
If the theoretical air required for the complete combustion of 1 kg of fuel is 10 kg, but the actual air supplied is 15 kg, what is the excess air as a percentage?
The total air supplied for combustion is defined as:
The total air supplied for combustion is defined as:
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