Question 172General Subjects - 1st Asst/Chief

The correct answer is C) 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. This is correct because for a properly lubricated ring-oiled line shaft bearing, the oil level should be high enough to allow the oiling rings to dip into the oil and freely rotate with the shaft. This ensures a continuous supply of lubricating oil to the bearing surfaces. The other options are incorrect because: A) Allowing oil to exit the bearing is not the proper way to maintain lubrication; B) The rings must be allowed to freely rotate to effectively distribute the oil; and D) Completely flooding the bearing is unnecessary and can lead to excessive oil consumption.