When the hot combustion gases travel through boiler tubes which are surrounded by the boiler water, the boiler is called a
a) watertube boiler
b) tubular boiler
c) packaged boiler
d) coil type boiler
e) firetube boiler
Answer: E
When the hot combustion gases travel through boiler tubes which are surrounded by the boiler water, the boiler is called a
a) watertube boiler
b) tubular boiler
c) packaged boiler
d) coil type boiler
e) firetube boiler