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Fuels

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Questions and Answers

Which elements in the fuel are the main combustible elements during combustion?

Sulfur and oxygen
Carbon and sulfur
Carbon and hydrogen (correct)
Oxygen and nitrogen

What are the combustion products when sulfur is present in the fuel?

Carbon dioxide and water vapor
Oxygen and nitrogen
Sulfur dioxide (correct)
Carbon monoxide

What is perfect combustion also called?

Incomplete combustion
Exothermic combustion
Stoichiometric combustion (correct)
Spontaneous combustion

Which element is considered an impurity in a fuel, even though it is combustible?

Sulfur (D) Signup and view all the answers

What is the equation for the incomplete combustion of sulfur?

2S + O2 -> SO2 + S (A) Signup and view all the answers

Why is the formation of free sulfur undesirable in combustion?

It represents a waste of fuel (B) Signup and view all the answers

Which of the following conditions is required for complete combustion to occur?

Sufficient air must be admitted to ensure all combustibles are burned. (D) Signup and view all the answers

What is the equation for the complete combustion of carbon?

$C + O_2 \rightarrow CO_2$ (A) Signup and view all the answers

Which of the following is a product of incomplete combustion?

Carbon monoxide (C) Signup and view all the answers

What is the equation for the incomplete combustion of hydrogen?

$2H_2 + O_2 \rightarrow H_2O + H_2$ (C) Signup and view all the answers

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