USCG Exam PracticeBoiler and steam propulsion fundamentals
Which type of marine boiler has water and steam inside the tubes with hot combustion gases passing over the outside of the tubes?
- A. Fire-tube (Scotch) boiler
- B. Donkey boiler
- ✓ Water-tube boilerCorrect
- D. Electric boiler
Why C is correct
In a water-tube boiler, water and steam are contained inside the tubes while hot combustion gases pass over the outside. This is the opposite arrangement from fire-tube (Scotch) boilers, in which hot gas runs through tubes surrounded by a large drum of water. (NAVEDTRA 14104 §4-1)
Cited:NAVEDTRA 14104 §4-1