Engine Safety (Supplementary) USCG Question #289 (Set 4)

Which area of the indicator diagram illustrated, indicates the ignition delay period in a diesel engine cylinder? Illustration MO-0033

USCG Exam Illustration MO-0033
USCG Examination Diagram: Illustration MO-0033
Official USCG Answer & Rule Citation

Correct Answer: Option C — J

Phase 'J' on a diesel cylinder indicator card represents the ignition delay period, spanning from the moment fuel is injected until the onset of actual rapid combustion and pressure rise.

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