148. Concerning the proper lubrication of a ring-oiled line shaft bearing, what statement is true?

The oil level should be maintained high enough so that some oil is seen exiting the bearing along the shaft.
The oil level should be high enough so that the oiling rings dip into the oil, but the rings must not be allowed to freely rotate with the shaft.
The oil level should be high enough so that the oiling rings dip into the oil, and the rings must freely rotate with the shaft.
The oil level should be maintained high enough so that the entire bearing is continuously flooded.

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