Unit 21 - Chapter 90 Flashcards
Cast iron boiler sections maximize heat transfer by
Exposing as large a surface as possible to the hot gases
Sectional cast iron boiler sections are connected with
Push nipples
Boiler water legs
Increase the heating surface
Boiler sections are held together with
Tie rods
The ratio of heat released to heat transferred to boiler is known as
Boiler efficiency
Most low capacity cast iron boilers
Will pass through standard sized doorways
The steam and water spaces of a cast iron sectional boiler are connected by
Push nipples
The steam and water spaces of a cast iron sectional boiler are held together by
Tie rods
In a vertical sectional boiler the sections are places
Side by side
The sections of cast iron boilers are mainly designed to obtain maximum
Heat transfer
The fins cast on the flat surface of the sections of a cast iron sectional boiler are used for the purpose of increasing the
Effectiveness of heat transfer
To prevent flue gases from escaping in a cast iron sectional boiler, the spaces between the sections are sealed with high temperature
Asbestos rope
Heating boilers attain maximum efficiency only when they are operated
Continuously at full load
Modular cast iron boiler water flow is
Continuous through all modules
In a cast iron modular heating boiler, the operation of the burner of each module is controlled by a ___ which starts or stops modules in sequence as load demand increases or decreases
Step controller
