USCG Exam PracticeBoiler and steam propulsion fundamentals
In a unit feed system governed by 46 CFR §56.50-30, how is the discharge from each feed pump and the feed supply to each boiler controlled?
- A. By a manually operated throttle valve adjusted by the watch engineer
- ✓ Automatically by the water level in that boiler, with manual control also providedCorrect
- C. By a group header pressure regulator common to all boilers
- D. By the feed pump relief valve setting alone
Why B is correct
46 CFR §56.50-30(e)(2) requires that in the unit feed system, the discharge from each pump and the feed supply to each boiler must be automatically controlled by the level of water in that boiler. In addition to the automatic control, manual control must also be provided.
Cited:46 CFR §56.50-30