USCG Exam PracticeBearings, lubrication, and care of machine parts
Under 46 CFR, a tailshaft with oil-lubricated bearings need not be drawn for examination provided several conditions are met. Which of the following is one of those required conditions?
- ✓ An analysis of the tailshaft bearing lubricant is performed semiannually to determine bearing material content or the presence of other contaminantsCorrect
- B. The tailshaft is fabricated of material resistant to corrosion by seawater
- C. The vessel is fitted with multiple shafts
- D. The tailshaft bearing clearance readings are taken annually regardless of drydock schedule
Why A 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. Corrosion-resistant material and multiple shafts are separate provisions under paragraphs (c) and (d), not conditions of paragraph (e).
Cited:46 CFR §61.20-17