The position of the interface between oil and water within the centrifuge is achieved by the use of （）.

In a bypass type lubrication system for a diesel engine， the dirty oil line to the centrifuge should be taken from the （）.

In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces ____. A: all of the oil used by the engine through a filter B: some of the oil used by the engine through a filter C: some of the oil used by the engine through a centrifuge D: all of the oil used by the engine through a centrifuge