🔍 Key Concepts

• How diesel engines burn fuel compared to gasoline engines • The role of fuel atomization and mixing with air in the combustion chamber • How fuel properties affect ignition and burning speed

💭 Think About

• Think about which property most directly affects how well the fuel forms a combustible mixture with air under engine conditions • Ask yourself: which property mainly influences how easily the fuel ignites and burns completely, rather than just its safety in storage? • Consider which properties are more about heat capacity or flow behavior versus those about how the fuel turns into a burnable vapor

✅ Before You Answer

• Identify which option is primarily a safety/storage characteristic rather than a combustion-efficiency characteristic • Separate properties that mainly affect engine cooling or heat storage from those that affect burning behavior • Focus on the property that most influences how readily the fuel vaporizes and mixes with air for efficient combustion