Motor Plants & Auxiliary Boilers USCG Q#273 (Set 6)

Theoretical perfect combustion in a diesel engine yields by-products of __________.

Official USCG Answer & Rule Citation

Correct Answer: Option D — water vapor and carbon dioxide

Theoretical stoichiometric combustion of hydrocarbon fuel in a diesel engine yields only water vapor (H2O) and carbon dioxide (CO2), alongside residual atmospheric nitrogen.

All Motor Plants & Auxiliary Boilers Sets Practice Set 6