Field erected boilers have outputs of?
75000 kg/h
100000kg/h
100mg/h
150000kg/h or more
Feed-water entering the boiler section first passes through the ________ section where it is heated by the combustion gases leaving the boiler.
furnace
economizer
boiler drum
superheater
Where electric power is used as the heating source, the boiler rating shall be the maximum kilowatt rating of the:
power plant
heating element
Boiler wiring
MCC
Generally two types of draft fans are used. A ____ ___ fan supplies air to the air preheater. The preheated air for combustion goes to the coal pulverizers and to the burners. An ______ ___ fan exhausts the combustion gases from the air heater to the stack.
center mounted, external mounted
forced draft, induced draft
induced draft, forced draft
turbine draft, ejection draft
The arrangement of a once through boiler has no drums. The feed water is heated and then evaporated and superheated in _____ _____ through the unit.
Two passes
One passage
3 passes
4 passes
The main advantage of the packaged boiler is its
small size
compact design
low cost
quality steam
Packaged watertube boilers capacities range from?
2300kg to 65000kg per hour
500kg to 100mg per hour
15psi to 15000
65000 to 100000 kg per hour
The advantage of forced circulation in a boiler for a _______ flow in all tubes
negative
greater
positive
mass
The steam separating equipment separates the _____ from the steam/water mixture
water
steam
impurities
water droplets
These types of boilers (A,D, and O) have furnaces cooled by _____ lining the furnace walls
watertubes
fans
desuperheaters
air circulation
