Following an overhaul of a crosshead type...

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Question 1 of 205eccefa3bacbc34ba4d47d33

Following an overhaul of a crosshead type diesel engine, the engine is jacked over with the turning gear as part of the pre-start procedure. Which of the listed pre-start procedures should be carried out?

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🔍 Key Concepts

• Pre-start procedures after overhauling a large slow-speed crosshead diesel • Purpose of turning gear jacking over (checking for liquid in cylinders, free rotation, abnormal resistance) • Functions of cylinder lubrication, air space drain cocks, and indicator valves during pre-start checks

💭 Think About

• When you jack the engine over slowly after maintenance, what dangerous condition are you especially trying to detect in the cylinders or scavenge spaces? • Which of the listed actions help you detect or safely relieve any trapped fluids or pressure while the engine is being turned? • Does any option listed seem unrelated to either protecting the engine from damage or confirming its readiness to start after overhaul?

✅ Before You Answer

• For each choice, ask: Does this action help prevent hydraulic lock or detect abnormal conditions during slow turning? • Consider whether proper cylinder lube oil flow is normally verified before, during, or after jacking over in standard engine-room practice. • Check your knowledge of what air space drain cocks and indicator valves are used for on large diesel engines, especially during pre-start and blow-through.

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