USCG Exam PracticeBoiler and steam propulsion fundamentals
Under 46 CFR §56.50-30, when a unit feed system is employed on a vessel with four boilers, what is the maximum number of boilers that any single auxiliary feed pump may serve?
- A. One boiler only, since each boiler must have a dedicated auxiliary pump
- ✓ Two boilersCorrect
- C. Three boilers
- D. All four boilers, provided the pump has sufficient capacity
Why B is correct
46 CFR §56.50-30(e)(1) states that in vessels with three or more boilers, not more than two boilers may be served by any one auxiliary pump. Although the auxiliary pumps may be interconnected so that any pump can feed any boiler, the regulatory limit of two boilers per auxiliary pump still applies.
Cited:46 CFR §56.50-30