If a crankcase explosion has occurred in a...

Question 1 / 270705eccefa1bacbc34ba4d47473

Question 1 of 270705eccefa1bacbc34ba4d47473

If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of the following precautions should be observed?

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Question 1 of 27070

If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of the following precautions should be observed?

🔍 Key Concepts

• 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

💭 Think About

• 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?

✅ Before You Answer

• 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.

Question 1 of 27070

If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of the following precautions should be observed?

The cylinder indicator cocks should be opened.

The sump lube oil scavenge pump should be secured immediately.

The explosion relief valves should be manually opened.

The crankcase should remain unopened until the engine has cooled.

Question 1 / 270705eccefa1bacbc34ba4d47473

Question 1 of 270705eccefa1bacbc34ba4d47473

If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of the following precautions should be observed?

Back

Question 1 of 27070

If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of the following precautions should be observed?