Engine_2014 : Motor Plants and Auxiliary Boilers - 855/2614
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| Sludge formation in a diesel engine lube oil system is caused by __________ . |
| A) carbonization of oils from the combustion chambers |
| B) emulsions of lube oil and water |
| C) coagulation of unburned fuel below the piston rings |
| D) All of the above. |
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