Feed-water entering the boiler section first passes through the ________ section where it is heated by the combustion gases leaving the boiler.
Respuesta
furnace
economizer
boiler drum
superheater
Pregunta 3
Pregunta
Where electric power is used as the heating source, the boiler rating shall be the maximum kilowatt rating of the:
Respuesta
power plant
heating element
Boiler wiring
MCC
Pregunta 4
Pregunta
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.
Respuesta
center mounted, external mounted
forced draft, induced draft
induced draft, forced draft
turbine draft, ejection draft
Pregunta 5
Pregunta
The arrangement of a once through boiler has no drums. The feed water is heated and then evaporated and superheated in _____ _____ through the unit.
Respuesta
Two passes
One passage
3 passes
4 passes
Pregunta 6
Pregunta
The main advantage of the packaged boiler is its
Respuesta
small size
compact design
low cost
quality steam
Pregunta 7
Pregunta
Packaged watertube boilers capacities range from?
Respuesta
2300kg to 65000kg per hour
500kg to 100mg per hour
15psi to 15000
65000 to 100000 kg per hour
Pregunta 8
Pregunta
The advantage of forced circulation in a boiler for a _______ flow in all tubes
Respuesta
negative
greater
positive
mass
Pregunta 9
Pregunta
The steam separating equipment separates the _____ from the steam/water mixture
Respuesta
water
steam
impurities
water droplets
Pregunta 10
Pregunta
These types of boilers (A,D, and O) have furnaces cooled by _____ lining the furnace walls