USCG Exam PracticeDeck machinery and ground tackle
A motor driving a windlass with hydraulic transmission must meet which minimum duty-cycle rating under 46 CFR §111.25-15?
- A. One-fourth hour at full load
- B. One-half hour at full load
- C. One hour at full load
- ✓ One-half hour idle pump operation followed by one-fourth hour at full loadCorrect
Why D is correct
Table 111.25-15 specifies that a windlass with hydraulic transmission requires half-hour idle pump operation followed by one-fourth hour full-load operation. This differs from the direct-acting windlass (one-fourth hour) and from a deck winch with hydraulic transmission, which requires continuous operation at no load followed by one-fourth hour at full load.
Cited:46 CFR §111.25-15