If a scavenging air space fire occurs on a slow speed diesel engine and the engine is stopped, which of the following should be done to prevent distortion due to heat?

Correct Answer: Option B — Engage and turn the engine with the jacking gear.

Engaging the jacking gear to slowly turn a stopped engine during a scavenge fire prevents localized thermal distortion and seizure of pistons within liners as hot spots cool unevenly.