If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of the following precautions should be observed?
⢠Crankcase explosions in diesel engines and typical causes (oil mist, hot spots) ⢠Purpose of crankcase relief (explosion) doors/valves and why they must NOT be forced ⢠Standard safety practice immediately after a crankcase explosion when the casing is still intact
⢠After an explosion, what is the greatest remaining danger inside the crankcase: pressure, temperature, or fresh ignition sources? How does that affect whether you open or leave things closed? ⢠Think about what happens if you open any access (doors, relief valves, crankcase covers) while internal surfaces are still very hot and oil mist may still be present. ⢠Which action is focused on preventing a second, more serious explosion rather than just checking engine condition or operating other systems?
⢠Verify which option involves physically opening a path into the crankcase or related spaces and whether that is safe while hot. ⢠Confirm standard guidance: does marine practice advise to keep the crankcase closed and allow it to cool before inspection, or to open it right away? ⢠Check which choices are routine operating actions (indicator cocks, lube oil pump, relief valves) versus a clear safety precaution after an internal explosion.
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