ABSA 3B1 Practice UPDATED ACTUAL Questions and
CORRECT Answers
CHAPTER 1 - Number of Chapter 1
questions on exam - 7
Packaged watertube boilers a. 2300 kg to 65000 kg per hour
capacities range from?
a. 2300 kg to 65000 kg per hour
b. 500 kg to 100 mg per hour
c. 15 psi to 15000 kg per hour d.
65000 to 100000 kg per hour
The main advantage of the c. low cost
packaged boiler is its _____ _. a.
small size
b. compact design
c. low cost
d. quality steam
Field erected boilers have d. 150000 kg/h or more
outputs of?
a. 75000 kg/h
b. 100000 kg/h
c. 100 mg/h
d. 150000 kg/h or more
,One square metre of heating a. True
surface equals 10 kilowatts. The
heating surface of a boiler must
be determined by computing
the area of the surface involved
in square metres and where a
computation is to be made of a
curved surface; the surface
having the greater radius shall
be taken.
a. True
b. False
Where electric power is used as b. heating element
the heating source, the boiler
rating shall be the maximum
kilowatt rating of the _______ _.
a. power plant
b. heating element
c. boiler wiring
d. MCC
Where the boiler provides the a. True
entire steam supply to an
electric generating unit, the
output of the boiler is expressed
in terms of power output of the
generator (for example a 300
megawatt boiler).
a. True
b. False
The downcomers are located in b. cooler, hottest
the ____ regions of the boiler, or
external to the furnace
altogether. The risers are
located in the ______zones of
the boiler, being exposed to
radiant heat of the furnace or to
the very hot flue gases near the
furnace.
a. back, front
b. cooler, hottest
c. water, furnace
d. drum, radiant
Most downcomers run b. False
horizontally between the steam
drum and the mud drum.
a. True
b. False
The steam separating equipment b. steam
separates the ____ from the
steam/water mixture. a. water
b. steam
c. impurities
d. water droplets
, There are several factors that e. All of the above
influence the natural circulation
in a watertube boiler. These are:
a. The height of the steam drum
above the bottom drum or
header.
b. The amount of heat applied to
the tube. The hotter the tube
becomes, the more steam
bubbles are formed, creating
more mass differential and thus
more circulation.
c. The operating pressure of the
boiler. As boiler pressures
increase, the density of the
steam increases
d. The cleanliness of the tubes
can also affect circulation.
e. All of the above
The purpose of the downcomer d. Steam to steam drum
is to supply:
a. Hot water to the steam drum
b. Cool water to the steam drum
c. Cool water from steam drum
to rest of boiler
d. Steam to steam drum
e. Boiler feed water to the boiler
These types of boilers (A, D, and a. watertubes
O) have furnaces cooled by
_ ____ lining the furnace walls.
a. watertubes
b. fans
c. desuperheaters
d. air circulation
In the A, D & O type boiler a. True
steam bubbles form in the
hottest tubes and rise to the
steam drum, where the steam is
separated out of the water and
steam mixture. Circulation is
maintained by water returning to
the mud drum through the
cooler tubes. The hotter tubes,
risers, are the ones in the radiant
area of the furnace and the
hottest areas of the generating
bank of tubes.
a. True
b. False
CORRECT Answers
CHAPTER 1 - Number of Chapter 1
questions on exam - 7
Packaged watertube boilers a. 2300 kg to 65000 kg per hour
capacities range from?
a. 2300 kg to 65000 kg per hour
b. 500 kg to 100 mg per hour
c. 15 psi to 15000 kg per hour d.
65000 to 100000 kg per hour
The main advantage of the c. low cost
packaged boiler is its _____ _. a.
small size
b. compact design
c. low cost
d. quality steam
Field erected boilers have d. 150000 kg/h or more
outputs of?
a. 75000 kg/h
b. 100000 kg/h
c. 100 mg/h
d. 150000 kg/h or more
,One square metre of heating a. True
surface equals 10 kilowatts. The
heating surface of a boiler must
be determined by computing
the area of the surface involved
in square metres and where a
computation is to be made of a
curved surface; the surface
having the greater radius shall
be taken.
a. True
b. False
Where electric power is used as b. heating element
the heating source, the boiler
rating shall be the maximum
kilowatt rating of the _______ _.
a. power plant
b. heating element
c. boiler wiring
d. MCC
Where the boiler provides the a. True
entire steam supply to an
electric generating unit, the
output of the boiler is expressed
in terms of power output of the
generator (for example a 300
megawatt boiler).
a. True
b. False
The downcomers are located in b. cooler, hottest
the ____ regions of the boiler, or
external to the furnace
altogether. The risers are
located in the ______zones of
the boiler, being exposed to
radiant heat of the furnace or to
the very hot flue gases near the
furnace.
a. back, front
b. cooler, hottest
c. water, furnace
d. drum, radiant
Most downcomers run b. False
horizontally between the steam
drum and the mud drum.
a. True
b. False
The steam separating equipment b. steam
separates the ____ from the
steam/water mixture. a. water
b. steam
c. impurities
d. water droplets
, There are several factors that e. All of the above
influence the natural circulation
in a watertube boiler. These are:
a. The height of the steam drum
above the bottom drum or
header.
b. The amount of heat applied to
the tube. The hotter the tube
becomes, the more steam
bubbles are formed, creating
more mass differential and thus
more circulation.
c. The operating pressure of the
boiler. As boiler pressures
increase, the density of the
steam increases
d. The cleanliness of the tubes
can also affect circulation.
e. All of the above
The purpose of the downcomer d. Steam to steam drum
is to supply:
a. Hot water to the steam drum
b. Cool water to the steam drum
c. Cool water from steam drum
to rest of boiler
d. Steam to steam drum
e. Boiler feed water to the boiler
These types of boilers (A, D, and a. watertubes
O) have furnaces cooled by
_ ____ lining the furnace walls.
a. watertubes
b. fans
c. desuperheaters
d. air circulation
In the A, D & O type boiler a. True
steam bubbles form in the
hottest tubes and rise to the
steam drum, where the steam is
separated out of the water and
steam mixture. Circulation is
maintained by water returning to
the mud drum through the
cooler tubes. The hotter tubes,
risers, are the ones in the radiant
area of the furnace and the
hottest areas of the generating
bank of tubes.
a. True
b. False
