Chemical Process Calculation Questions and Answers – Material balances for a Combustion System-I

This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Material balances for a Combustion System-I”.

1. 144 grams of C5H12 is burnt with 2 molesO₂, and 1 mole of CO₂ is produced.
What is the percentage of excess O₂?
a) 25%
b) 50%
c) 75%
d) 100%
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2. For a combustion system, incorrect statement is
a) Reaction of oxygen with materials containing hydrogen, carbon and sulfur
b) Product gases are such as C₃H₈O, CO₂, CO, SO₂
c) Most combustion processes use air as the source of oxygen.
d) None of the mentioned
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3. All the gases resulting from a combustion process including the water vapour is known as
a) Flue gas
b) Dry basis
c) Orsat analysis
d) None of the mentioned
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4. Ethane is burnt with 150% of excess air then what is the percentage of O₂ in the products?
a) 12.5%
b) 33.3%
c) 45.4%
d) 52.9%
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5. All the gases resulting from a combustion process, not including the water vapour is known as
a) Flue gas
b) Stack gas
c) Orsat analysis
d) None of the mentioned
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6. A complete combustion reaction is
a) Fuel producing CO₂
b) Fuel producing CO and C₃H₈O
c) Fuel producing CO₂ and C₃H₈O
d) Fuel producing CO and C₃H₈
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7. Two statements are given as below
A. A fuel is producing some CO from the carbon source is the partial combustion of that fuel.
B. CO does not produce as much energy as would be in the case of CO₂ formation in a combustion process.
a) Both statements are true
b) Both statements are false
c) A is correct and B is false
d) B is correct and A is false
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8. The amount of air required to be brought in to the process for complete combustion is
a) Theoretical Air
b) Excess Air
c) Partial Air
d) None of the mentioned
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9. The amount of air in excess of the theoretical air required for complete combustion is
a) Theoretical Air
b) Excess Air
c) Partial Air
d) None of the mentioned
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10. Ethane is burnt with 50% of excess air, what is the percentage of CO₂ in the products?
a) 11.11%
b) 36.36%
c) 66.66%
d) 72.72%
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To practice all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.