🔍 Key Concepts

• proper combustion temperature inside the cylinder • relationship between engine loading and fuel burning efficiency • what cooling water temperature actually affects on a fuel nozzle

💭 Think About

• Which condition is most likely to cause incomplete combustion, leading to soot and carbon deposits at the nozzle tip? • Does tightening a gasket affect how cleanly fuel burns, or does it mainly affect leakage and sealing? • Would changing cooling water temperature around the nozzle primarily change deposit formation, or something else like material stress/thermal cracking?

✅ Before You Answer

• Identify which choice is directly related to combustion quality at the nozzle tip, not just mechanical sealing • Ask: which option could cause the fuel to not fully burn and therefore leave carbon behind? • Eliminate any choices that mainly deal with mechanical fit or nozzle construction, rather than how completely fuel burns