USCG Exam PracticeBoiler and steam propulsion fundamentals
Under 46 CFR §56.50-30, when a group feed system is employed and a feed pump is attached to the main propulsion unit, what additional pumping capacity must be provided by independently driven pumps?
- A. One independently driven pump at 100% normal capacity, plus a second at 50% normal capacity
- ✓ One independently driven pump at 100% normal capacity, plus a second at 75% normal capacityCorrect
- C. Two independently driven pumps each at 75% normal capacity
- D. One independently driven pump at 75% normal capacity only
Why B is correct
46 CFR §56.50-30(d)(1) requires that when a feed pump is attached to the main propulsion unit, at least one independently driven pump capable of supplying the operating boilers at their normal capacity must be provided, plus a second independently driven pump capable of supplying such boilers at 75 percent of their normal capacity.
Cited:46 CFR §56.50-30