Boilers supported from the top
a) are mostly package boilers
b) are free to expand vertically
c) can only be used on small units
d) are usually not of the large water tube type
e) can only use straight tubes
Answer: B
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Basic Boiler Construction
- In early boilers, furnace walls were constructed of brick. Today this method has been replaced by the use of
- Three types of furnace water-walls are the tangent tube, welded fin, and
- With a bottom-supported boiler, the steam drum is usually
- Internal furnaces are
- A Morison furnace is
- Manholes are
- A boiler nozzle attachment
- A major force which acts to hold a manway door in place during boiler operation is
- Boiler stays
- The flat surfaces which require staying in a firetube boiler are the tube sheets, waterless, and
- A tube expander is used to
- Tubes for high-pressure service are usually
- Post weld heat treatment is
- A non-destructive test on a boiler is
- With regard to welding, heat treatment
- Head-to-drum circumferential joints are usually
- The circumferential seam of a riveted boiler shell utilized the
- One or more steel plates rolled into a cylindrical form and welded together, with the ends closed by means of end plates or heads, is called a
- Common shell and drum thickness range is