Engineering · Steam — Boilers
In a water-tube boiler, the water/steam is inside the tubes and the hot gases are:
- AInside the tubes with the water
- BOutside the tubes, around them✓ Correct
- CCarried only in the steam drum
- DDrawn through the economizer only
Explanation
A water-tube boiler carries water inside the tubes and combustion gas around the outside — the reverse of a fire-tube boiler. This allows higher pressures and faster steaming.
Authority: Steam Plants (USCG engineering topic)
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