Basic Boiler Construction Flashcards
Common shell and drum thickness range is
a) 2 to 12 mm
b) 6 to 250 mm
c) 15 to 300 mm
d) 100 to 1,000 mm
e) 200 to 250 mm
b) 6 to 250 mm
One or more steel plates rolled into cylindrical form and welded together, with the ends closed by means of end plates or heads, is called a a) combustion chamber b) packaged boiler c) steam or water drum d) steam header e) steam space
c) steam or water drum
The circumferential seam of a riveted boiler shell utilized
the
a) lap joint, single or double riveted
b) treble riveted butt joint
c) double equal strap double riveted butt joint
d) double unequal strap treble riveted butt joint
e) always a single riveted lap joint
a) lap joint, single or double riveted
Head-to-drum circumferential joints are usually
a) double welded butt joints
b) single welded edge joints
c) fillet welded corner joints
d) double welded tee joints
e) fillet welded lap joints
a) double welded butt joints
With regard to welding, heat treatment
a) will increase the hardness of the material
b) results in better penetration of the weld
c) will relieve stresses in the material due to welding
d) is done before the actual welding takes place
e) is done to warm the welding machine before use
c) will relieve stresses in the material due to welding
A non-destructive test on a boiler is
a) a tensile test
b) a bend test
c) a shear test
d) an X-ray test
e) all of the above
e) all of the above
Post weld heat treatment is
a) to make the material hot enough for welding
b) heating the material after welding
c) to improve weld penetration
d) to clean up the welded area
e) done to reduce corrosion
b) heating the material after welding
Tubes for high pressure service are usually
a) resistance welded construction
b) roll and pierce construction
c) lap welded construction
d) flared into the drum or tubesheet
e) of 2 metre maximum length
b) roll and pierce construction
A tube expander is used to
a) break loose scale in the tube
b) break loose scale outside the tube
c) expand and flare the tube
d) bead the tube
e) expand the entire tube
c) expand and flare the tube
The flat surfaces which require staying in a firetube boiler are the tubesheets, waterlegs, and a) furnace tubes b) flue gas baffles c) uptakes d) crown sheets e) access doors
d) crown sheets
Boiler stays
a) are used to support flat surfaces in a boiler
b) are mostly used in water tube boilers
c) have to be replaced every two years
d) are used for hot water heating boilers only
e) are made of hollow tubes
a) are used to support flat surfaces in a boiler
A major force which acts to hold a manway door in place during boiler operation is a) the bolt b) the combination of bolt and yoke c) pressure within the boiler d) the manway gasket e) the yoke
c) pressure within the boiler
A boiler nozzle attachment2
a) can be found in the area of the burner
b) is always installed vertically
c) allows a connection for the uptake
d) is used for steam cleaning the fireside
e) nearly always accommodates a valve or fitting
e) nearly always accommodates a valve or fitting
Manholes are
a) installed on all boilers
b) provided for inspection purposes
c) always circular in shape
d) installed on fossil fired boilers only
e) always oval in shape
b) provided for inspection purposes
A Morison furnace is
a) found in electric boilers
b) found in locomotive boilers
c) found in watertube boilers
d) found in firetube boilers
e) a ring-reinforced type furnace
d) found in firetube boilers
