Engineering · Diesel — Fuel Injection
The purpose of a fuel-injection nozzle (atomizer) is to:
- AMeter the volume of fuel for the next cylinder
- BSpray finely atomized fuel into the combustion chamber at high pressure✓ Correct
- CPressurize the fuel from the day tank
- DCool the injector before the next stroke
Explanation
The injector/atomizer breaks the high-pressure fuel into a fine spray so it mixes thoroughly with the hot compressed air for rapid, complete combustion.
Authority: Diesel Engines (USCG engineering topic)
Practice the full Engineering bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Engineering questions
- Diesel — Fuel Injection
A dribbling or dripping injector nozzle (poor cut-off) typically causes:
- Diesel — Fuel Injection
Proper atomization of fuel by an injector is important because finely divided fuel:
- Diesel — Operating Cycle
In a four-stroke-cycle diesel engine, the events occur in which order?
- Diesel — Operating Cycle
Compared with a four-stroke engine of the same speed and cylinder size, a two-stroke-cycle diesel produces a power stroke:
- Diesel — Air Systems
The primary purpose of scavenging in a two-stroke diesel engine is to:
- Diesel — Air Systems
A turbocharger increases engine power output mainly by: