In early boilers, furnace walls were constructed of brick. Today this method has been replaced by the use of

In early boilers, furnace walls were constructed of brick. Today this method has been replaced by the use of

a) baffles
b) steel casing
c) tubes to form the furnace walls
d) plastic insulation
e) block insulation

Answer: C

Three types of furnace water-walls are the tangent tube, welded fin, and

Three types of furnace water-walls are the tangent tube, welded fin, and

a) flat stub
b) corrugated
c) refractory backed
d) flat stud
e) metal lath

Answer: D

Boilers supported from the top

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

With a bottom-supported boiler, the steam drum is usually

With a bottom-supported boiler, the steam drum is usually

a) a cross-drum configuration
b) supported by an overhead girder arrangement
c) supported by the water tubes
d) supported by piers
e) placed below the centreline of the unit

Answer: C

Internal furnaces are

Internal furnaces are

a) mostly used to superheat the steam
b) contained within the windbox of a boiler
c) used to increase the strength of the drum
d) used for oil firing only
e) contained within the shell of the boiler

Answer: E

A Morison furnace is

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

Answer: D

Manholes are

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

Answer: B

A boiler nozzle attachment

A boiler nozzle attachment

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

Answer: E

A major force which acts to hold a manway door in place during boiler operation is

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

Answer: C

Boiler stays

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

Answer: A

The flat surfaces which require staying in a firetube boiler are the tube sheets, waterless, and

The flat surfaces which require staying in a firetube boiler are the tube sheets, waterless, and

a) furnace tubes
b) flue gas baffles
c) uptakes
d) crown sheets
e) access doors

Answer: D

A tube expander is used to

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

Answer: C

Tubes for high-pressure service are usually

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 tube sheet
e) of 2 metre maximum length

Answer: B

Post weld heat treatment is

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

Answer: B

A non-destructive test on a boiler is

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

Answer: E

With regard to welding, heat treatment

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

Answer: C

Head-to-drum circumferential joints are usually

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

Answer: A

The circumferential seam of a riveted boiler shell utilized the

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

Answer: A

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

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

a) combustion chamber
b) packaged boiler
c) steam or water drum
d) steam header
e) steam space

Answer: C

Common shell and drum thickness range is

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

Answer: B