Question 122Motor Plants - QMED70% to pass
What statement is true concerning oil-lubricated stern tube bearings?
AI Explanation
The correct answer is D.
The forward and after seals on an oil-lubricated stern tube bearing are both designed to retain the lubricating oil within the bearing. The after seal is specifically designed to prevent the ingress of sea water into the stern tube. This is necessary to maintain the proper lubrication of the bearing and prevent damage or failure.
The other answer choices are incorrect because they do not accurately describe the function of the forward and after seals. Options A, B, and C either misstate the purpose of the seals or assign the wrong seal the task of preventing sea water ingress.
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