MDE 6 Q2

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Actions After Crankcase Oil Mist Detector Activation

Question: What actions should the on-watch engineer take when the engine crankcase oil mist detector activates?

D) Perform a routine check of the engine’s air intake system

B) Shut down the engine immediately and investigate the cause

A) Increase engine speed to reduce pressure

C) Check the fuel level and adjust as necessary

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High Crankcase Pressure Implications and Actions

Question: If the daily engine log shows that the engine crankcase pressure gauge is indicating a much higher value than the normal reading, what are the implications and immediate actions that should be taken?

B) High crankcase pressure may indicate potential issues such as excessive blow-by or ventilation problems; immediately shut down the engine and inspect the crankcase ventilation system and seals.

D) The increased pressure is usually due to low oil levels; top up the engine oil and restart the engine.

C) High crankcase pressure typically results from a faulty fuel pump; replace the fuel pump immediately.

A) The engine may be operating normally; no immediate action is required. Continue to monitor.

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Crankcase Explosion Relief Door Components

Question: Which of the following lists the MAIN components of a crankcase explosion relief door?

C) Relief door, blast shield, hinge mechanism, and latch

B) Relief door, pressure sensor, actuator, and safety valve

D) Relief door, control lever, inspection window, and sealing ring

A) Relief door, pressure spring, locking pin, and gasket

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Further Actions After Crankcase Oil Mist Detector Activation

Question: After shutting down the engine due to activation of the crankcase oil mist detector, what additional actions should the on-watch engineer take?

A) Immediately restart the engine to clear the fault

D) Monitor the engine oil level and top it up if necessary

C) Clean the engine’s fuel injectors and replace the air filter

B) Check for signs of oil leaks and inspect the crankcase ventilation system

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