USCG Exam PracticeBearings, lubrication, and care of machine parts
A tailshaft fitted with oil-lubricated bearings may be exempt from being drawn for examination provided several conditions are met. Which of the following is one of those required conditions?
- A. The tailshaft must be fabricated of a material resistant to corrosion by seawater.
- ✓ An analysis of the tailshaft bearing lubricant must be performed semiannually.Correct
- C. The vessel must be fitted with multiple shafts.
- D. The propeller must be of the flanged type.
Why B is correct
46 CFR §61.20-17(e)(3) requires that an analysis of the tailshaft bearing lubricant be performed semiannually in accordance with the lubrication system manufacturer's recommendations to determine bearing material content or the presence of other contaminants, as one of the conditions allowing the tailshaft to remain undrawn.
Cited:46 CFR §61.20-17