Engine 2014: Steam Plants

1. A Those parts of a boiler which are exposed on one side to only the water being heated and on the other side to the combustion gases, such as the economizer surfaces.
2. B Those parts of a boiler which are exposed on one side to only the steam being heated and on the other side to the combustion gases, such as the superheater surfaces.
3. C Those parts of a boiler which are exposed on one side to the water or steam being heated, and on the other side to the combustion gases.
4. D Those parts of a boiler which are exposed on one side to only the water being heated and on the other side being directly exposed to the furnace flame.

Tip: press A-D to answer