Only some of the firetubes in firetube boilers are:

Only some of the firetubes in firetube boilers are:

A ) expanded
B ) beaded
C ) flared
D ) rolled
E ) seal welded



Answer: E

Boiler tubes may be fabricated in a _________ form, or they may be welded.

Boiler tubes may be fabricated in a _________ form, or they may be welded.

A ) rolled
B ) seamless
C ) seamed
D ) cast


Answer: B

To form a drum or shell of the required diameter, the plates must be rolled to the correct _________.

To form a drum or shell of the required diameter, the plates must be rolled to the correct _________.

A ) thickness
B ) width
C ) diameter
D ) curvature



Answer: D

Boiler tubes are sometimes welded to _____, which have already been welded to the headers or drum.

Boiler tubes are sometimes welded to _____, which have already been welded to the headers or drum.

A ) tubes
B ) welds
C ) stubs
D ) manholes



Answer: C

Directly after rolling and while the tube is still hot, a reeling machine shown in Fig. 14 smooths the outer surface. This is called __________.

Directly after rolling and while the tube is still hot, a reeling machine shown in Fig. 14 smooths the outer surface. This is called __________.

A ) stressing
B ) reeling
C ) burnishing
D ) smoothing



Answer: C

_______ boilers must be built or put together in the field (field erected).

_______ boilers must be built or put together in the field (field erected).

A ) Recovery
B ) Sectional
C ) Larger
D ) Package

Answer: C

In the field, the stress relieving of welded pipe joints may be accomplished by means of __________ induction coils, which are wrapped around the welded section of the pipe.

In the field, the stress relieving of welded pipe joints may be accomplished by means of __________ induction coils, which are wrapped around the welded section of the pipe.

A ) magnetic
B ) electrical
C ) gas
D ) heat



Answer: B

The ASME Code Section __ specifies that the size of an elliptical manhole shall not be less than 280 mm by 380 mm or 250 mm by 410 mm.

The ASME Code Section __ specifies that the size of an elliptical manhole shall not be less than 280 mm by 380 mm or 250 mm by 410 mm.

A ) IV
B ) VII
C ) III
D ) I

Answer: D

Postweld heat treatment, often called stressrelieving, consists of heating the welded parts uniformly, to a temperature sufficient to relieve most of the stresses created by the heat from the welding. The parts are then cooled at a constant rate.

Postweld heat treatment, often called stressrelieving, consists of heating the welded parts uniformly, to a temperature sufficient to relieve most of the stresses created by the heat from the welding. The parts are then cooled at a constant rate.

A ) True
B ) False



Answer: A

Drum manhole openings may be elliptical or _____.

Drum manhole openings may be elliptical or _____.

A ) slotted
B ) circular
C ) square
D ) dished


Answer: B

The gaskets used are the woven type for pressures up to _____ kPa and the metallic type for higher pressures.

The gaskets used are the woven type for pressures up to _____ kPa and the metallic type for higher pressures.

A ) 1500
B ) 2500
C ) 5000
D ) 3450


Answer: D

The drum is used as the major anchor point for other boiler components, and for this reason, accurate location is important.

The drum is used as the major anchor point for other boiler components, and for this reason, accurate location is important.

A ) structure
B ) header
C ) superheater
D ) drum


Answer: D

Coal pulverizers must be installed _____ to allow installation of coal piping to the boiler.

Coal pulverizers must be installed _____ to allow installation of coal piping to the boiler.

A ) last
B ) first
C ) only
D ) early



Answer: D

The _________ steel carries the weight of the steam drum and the major pressure components.

The _________ steel carries the weight of the steam drum and the major pressure components.

A ) structural
B ) main
C ) mild
D ) welded



Answer: A

Large quantities of ______ are used to complete the foundations, which must support the loads from the boiler and all of the auxiliary equipment.

Large quantities of ______ are used to complete the foundations, which must support the loads from the boiler and all of the auxiliary equipment.

A ) steel
B ) refractory
C ) earth
D ) cement



Answer: D

The covers fit on the ______ of the drum and are held in place by means of bolts and yoke pieces.

The covers fit on the ______ of the drum and are held in place by means of bolts and yoke pieces.

A ) ends
B ) outside
C ) inside
D ) middle


Answer: C

The boiler tubes themselves are used to support the top _____ in a bottom-supported boiler.

The boiler tubes themselves are used to support the top _____ in a bottom-supported boiler.

A ) cover
B ) drum
C ) header
D ) tubes



Answer: B

The use of a membrane or water-cooled walls has reduced the use of __________ in modern water tube boilers.

The use of a membrane or water-cooled walls has reduced the use of __________ in modern water tube boilers.

A ) refractory
B ) insulation
C ) cladding
D ) castables



Answer: D

Tubes for boiler application are either hot-finished, or _____ -drawn depending on the size, tolerance, and finish desired.

Tubes for boiler application are either hot-finished, or _____ -drawn depending on the size, tolerance, and finish desired.

A ) cold
B ) hot
C ) mild
D ) rough



Answer: A

Another method used to produce seamless tubes is known as ________.

Another method used to produce seamless tubes is known as ________.

A ) cold rolling
B ) extrusion
C ) polishing
D ) casting


Answer: B