What is the purpose of a crankcase explosion relief valve on a marine engine?
Direct Answer
Option B: Relieve internal crankcase overpressure safely and prevent flame return into engine room
Crankcase explosion relief valves are designed to rapidly vent internal overpressure caused by oil mist ignition. Fitted with internal flame arresters, they relieve pressure safely while preventing external flames from flashing back into the engine room space.
All Options
Detailed Explanation & Context
Crankcase explosion relief valves are designed to rapidly vent internal overpressure caused by oil mist ignition. Fitted with internal flame arresters, they relieve pressure safely while preventing external flames from flashing back into the engine room space.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Marine Engineering Knowledge (MEK).
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