5th class power engineering unit 1 Ch 1 Questions And Answers
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Course
Power Engineering
Institution
Power Engineering
baffle - ANS a wall, barrier or panel used to change the direction of flow of a liquid or gas. on the water side of a boiler used to direction flow of water. on fire side used to direct hot combustion gassed through banks of tubes.
drum - ANS the boiler shell together with th...
5th class power engineering unit 1 Ch 1
Questions And Answers
baffle - ANS a wall, barrier or panel used to change the direction of flow of a liquid or gas.
on the water side of a boiler used to direction flow of water. on fire side used to direct hot
combustion gassed through banks of tubes.
drum - ANS the boiler shell together with the heads form a drum to contain fluids being
heated.
shell - ANS drum of firetube boiler
economizer - ANS also used in high pressure steam boilers to preheat the boiler
feedwater before it enters the boiler
header - ANS a large pipe that supplies 2 or more collects from a series of smaller pipes
or tubes. is also called a manifold
heads - ANS steel plates that close off the ends of the boiler drum. also called end plates.
they can be flat curved or dished. curved heads are used for watertube drums whereas flat
heads are used on firetube shells
heating surface - ANS all parts of a boiler that heat from the burning fuel is transferred to
the water side of the boiler. it includes all parts of the boiler plates and tubes that have water or
steam on one side and are swept by fire or hot combustion gasses on the other side. the anount
of heating surface a boiler contains is used to determine the kw or horsepower rating of the
boiler
mud drum - ANS lower drum on watertube boilers where mud or sludge will collect and be
removed from the unit. also called lower header
stack - ANS a hollow duct through which combistion gasses are elevated for discharge to
the atmosphere. smokestack or chimney
superheater - ANS used in large high pressure steam boilers to increase the temp of the
steam above the original boiling point temp. produces very dry steam
Steam Space - ANS The area in the boiler provided to allow for steam to be separated
from the water line.
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