🔍 Key Concepts

• High-pressure fuel injection systems on diesel engines • How length and diameter of fuel lines affect fuel delivery and timing • Relationship between fuel line volume/pressure and injection characteristics

💭 Think About

• Think about what would change if the fuel line volume increased or decreased compared to the original design. • Consider how fuel pressure waves and timing in a high-pressure line depend on its dimensions. • Ask yourself which option relates directly to engine performance and combustion, not logistics or mounting convenience.

✅ Before You Answer

• Verify which choice is directly tied to fuel pressure, timing, and atomization at the injector. • Check whether the reason must be about engine operating characteristics rather than maintenance or inventory concerns. • Confirm that the correct reason would apply even if supports, braces, and inventory were not issues at all.