USCG Exam PracticeBoiler and steam propulsion fundamentals
Under 46 CFR §63.20-1, following an emergency safety trip of an automatic auxiliary boiler, which statement correctly describes the required postpurge procedure?
- A. Air flow must automatically increase to purge the furnace before the next firing sequence
- ✓ Postpurge must be accomplished manually; air flow must not automatically increase after the tripCorrect
- C. The boiler control system must initiate a low-fire purge automatically within 30 seconds
- D. Postpurge is not required following an emergency safety trip; the boiler may be restarted immediately
Why B is correct
46 CFR §63.20-1(a) explicitly states that following emergency safety trip control operation, the air flow to the boiler must not automatically increase, and postpurge must be accomplished manually. This prevents the automatic introduction of air into a potentially fuel-rich furnace.
Cited:46 CFR §63.20-1