Engine 2014: Steam Plants

1. A A down fired two furnace boiler with a vertical superheater, economizer, waterwalls and downcomers.
2. B A Scotch boiler with a horizontal superheater, economizer, waterwalls and downcomers.
3. C A two drum, single furnace, D type boiler with an interdeck superheater, an economizer, water walls and downcomers.
4. D A sectional header boiler with a superheater, economizer,  and water walls and downcomers.

Tip: press A-D to answer