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An engine using octane-air mixture has N2, O2, CO2, CO and H2O as constituents in the exhaust gas. Which one of the following can be concluded?
- a)Supply mixture is stoichiometric
- b)Supply mixture has incomplete combustion
- c)Supply mixture is rich
- d)Supply mixture is lean
Correct answer is option 'B'. Can you explain this answer?
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An engine using octane-air mixture has N2, O2, CO2, CO and H2O as cons...
Ans. (b)
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An engine using octane-air mixture has N2, O2, CO2, CO and H2O as cons...
Explanation:
In an engine using an octane-air mixture, the exhaust gas consists of various constituents such as N2, O2, CO2, CO, and H2O. Based on the composition of the exhaust gas, we can conclude the following:
1. Stoichiometric Mixture:
A stoichiometric mixture refers to the ideal air-fuel ratio required for complete combustion. In this case, the exhaust gas would primarily consist of nitrogen (N2), carbon dioxide (CO2), and water vapor (H2O). However, since the exhaust gas contains other constituents such as O2 and CO, we can conclude that the mixture is not stoichiometric.
2. Incomplete Combustion:
Incomplete combustion occurs when there is insufficient oxygen available for the complete oxidation of the fuel. This leads to the formation of carbon monoxide (CO) instead of carbon dioxide (CO2). The presence of CO in the exhaust gas indicates incomplete combustion, as CO is a product of partial oxidation. Therefore, we can conclude that the supply mixture has incomplete combustion.
3. Rich Mixture:
A rich mixture refers to an air-fuel mixture with an excess of fuel compared to the ideal stoichiometric ratio. In a rich mixture, the exhaust gas would contain unburned hydrocarbons (HC) and carbon monoxide (CO). However, since the exhaust gas also contains nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and water vapor (H2O), we cannot conclude that the supply mixture is rich.
4. Lean Mixture:
A lean mixture refers to an air-fuel mixture with an excess of air compared to the ideal stoichiometric ratio. In a lean mixture, the exhaust gas would primarily contain nitrogen (N2), oxygen (O2), and carbon dioxide (CO2). However, since the exhaust gas also contains carbon monoxide (CO) and water vapor (H2O), we cannot conclude that the supply mixture is lean.
Therefore, based on the composition of the exhaust gas, we can conclude that the supply mixture has incomplete combustion (option B).
In an engine using an octane-air mixture, the exhaust gas consists of various constituents such as N2, O2, CO2, CO, and H2O. Based on the composition of the exhaust gas, we can conclude the following:
1. Stoichiometric Mixture:
A stoichiometric mixture refers to the ideal air-fuel ratio required for complete combustion. In this case, the exhaust gas would primarily consist of nitrogen (N2), carbon dioxide (CO2), and water vapor (H2O). However, since the exhaust gas contains other constituents such as O2 and CO, we can conclude that the mixture is not stoichiometric.
2. Incomplete Combustion:
Incomplete combustion occurs when there is insufficient oxygen available for the complete oxidation of the fuel. This leads to the formation of carbon monoxide (CO) instead of carbon dioxide (CO2). The presence of CO in the exhaust gas indicates incomplete combustion, as CO is a product of partial oxidation. Therefore, we can conclude that the supply mixture has incomplete combustion.
3. Rich Mixture:
A rich mixture refers to an air-fuel mixture with an excess of fuel compared to the ideal stoichiometric ratio. In a rich mixture, the exhaust gas would contain unburned hydrocarbons (HC) and carbon monoxide (CO). However, since the exhaust gas also contains nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and water vapor (H2O), we cannot conclude that the supply mixture is rich.
4. Lean Mixture:
A lean mixture refers to an air-fuel mixture with an excess of air compared to the ideal stoichiometric ratio. In a lean mixture, the exhaust gas would primarily contain nitrogen (N2), oxygen (O2), and carbon dioxide (CO2). However, since the exhaust gas also contains carbon monoxide (CO) and water vapor (H2O), we cannot conclude that the supply mixture is lean.
Therefore, based on the composition of the exhaust gas, we can conclude that the supply mixture has incomplete combustion (option B).
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An engine using octane-air mixture has N2, O2, CO2, CO and H2O as constituents in the exhaust gas. Which one of the following can be concluded?a)Supply mixture is stoichiometricb)Supply mixture has incomplete combustionc)Supply mixture is richd)Supply mixture is leanCorrect answer is option 'B'. Can you explain this answer?
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