These types of boilers (A, D, and O) have furnaces cooled by _________ lining the furnace walls.
A ) water tubes
B ) fans
C ) desuperheaters
D ) air circulation
Answer: A
These types of boilers (A, D, and O) have furnaces cooled by _________ lining the furnace walls.
A ) water tubes
B ) fans
C ) desuperheaters
D ) air circulation