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 Today this method has been replaced by the use of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 Today this method has been replaced by the use of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