MCA SV Auxiliary Equipment Part 2 Practice Questions - MCA Small Vessel Engineering - Auxiliary Equipment Part 2 (SQA Written Examination 059-02) Exam

Why do variable-delivery pumps on deck machinery often include a case-drain (leakage) return line to tank?

To feed fuel to the main engine Internal leakage and cooling/flush flow from the rotating group must return to tank without pressurising the case To replace the main pressure relief valve To keep the suction strainer dry

Correct Answer:

Internal leakage and cooling/flush flow from the rotating group must return to tank without pressurising the case

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