MAJ EOOW Engineer Exam Practice Questions - Maritime Authority Of Jamaica Engineer Officer Of The Watch (STCW III 1) Certificate Of Competency Examination Exam

Why is a separate cylinder lubrication system used on a large crosshead two-stroke marine diesel engine?

Because the cylinder liner is isolated from the crankcase and needs its own alkaline oil to neutralise acids Because the crankcase oil is too thin to climb the liner Because cylinder oil must be electrically conductive Because the engine has no crankcase oil at all

Correct Answer:

Because the cylinder liner is isolated from the crankcase and needs its own alkaline oil to neutralise acids

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