Oil Mist and Crankcase

Question 1

procedure to follow in the event a oil mist detector shows alarm

Answer 1

1. go and check the alarm is real
2. raise alarm
3. evacuate the engine room. if bridge needs engine for propulsion
4. if not evacuate the engine room and shut down the engine allow to cool.
5. Once cooled open crank case doors
6. open sky doors to cool the engine room
7. inspect
8. get a fire team ready also

Question 2

2 causes of a crank case explosion

Answer 2

1. high main bearing temperature
2. piston causing friction at stuffing box
3. lube oil is restricted, e. g. filter, pump
4. scavenge fire
5. piston missalingment

Question 3

how is a crank case explosion chance minimised

Answer 3

1. correct cooling
2. oil mist detector
3. crank case explosion valve
4. Good maintenance