USCG Exam PracticeDeck machinery and ground tackle
Under 46 CFR §111.25-15, a deck winch motor with hydraulic transmission must meet which duty cycle requirement?
- A. One-half hour short-time rating at full load
- B. Continuous duty rating at full load
- ✓ Continuous operation at no load followed by one-half hour at full loadCorrect
- D. One-fourth hour short-time rating at full load
Why C is correct
46 CFR §111.25-15 Table 111.25-15 specifies that a deck winch with hydraulic transmission must be rated for continuous operation at no load followed by one-half hour at full load. This differs from a direct-acting deck winch, which requires only a one-half hour short-time rating, reflecting the different thermal and mechanical loading profiles of hydraulic versus direct-drive systems.
Cited:46 CFR §111.25-15