ABSA 4A EXAM
The inner tube on a soot blower lance __________, and conveys
steam from the poppet valve to the outer tube:
a. advances the lance tube into the boiler
b. rotates in a spiral fashion
c. remains stationary
d. forms a helical blowing pattern - ANSWERS-c. remains stationary
This is a pressure vessel that intercepts, cools and depressurizes boiler
water in order to protect municipal sewer systems:
a. blowby vessel
b. blowthrough vessel
c. blowoff vessel
d. blowdown separator - ANSWERS-c. blowoff vessel
To reduce the total solids concentration in the boiler water, this is
done at all times:
a. coagulation
b. intermittent blowdown
c. chemical addition
d. continuous blowdown - ANSWERS-d. continuous blowdown
,The water temperature at the blowoff tank outlet must not exceed
_________ degrees C:
a. 75
b. 65
c. 85
d. 55 - ANSWERS-b. 65
According to ASME B31.1, at least one boiler blowoff valve must be
a _________ design:
a. Y-type
b. hard seated
c. quick opening
d. slow opening - ANSWERS-d. slow opening
Two element feedwater controllers respond to:
a. drum level and steam flow
b. drum level and feedwater flow
c. steam flow and feedwater flow
d. drum level and fuel flow - ANSWERS-a. drum level and steam
flow
Two independent low-water fuel cut-offs must be installed for steam
boiler:
a. producing high pressure steam
b. not continuously attended
,c. in areas with human occupancy
d. under national law - ANSWERS-b. not continuously attended
Combustion airflow to the furnace and flue gas flow from the furnace
are controlled with:
a. combustion velocity control and fan speed control
b. damper control and fan speed control
c. damper control and combustion velocity control
d. all of the listed items - ANSWERS-b. damper control and fan speed
control
The method and amount of air supplied for combustion depends on
the type of:
a. fuel being burned
b. draft system in place
c. atmospheric conditions
d. all of the listed items - ANSWERS-a. fuel being burned
This type of draft system relies on the difference in density to provide
combustion air to a furnace:
a. balanced draft
b. induced draft
c. forced draft
d. natural draft - ANSWERS-d. natural draft
, This type of fluidized bed boiler is used for combined cycle plants:
a. pressurized
b. atmospheric
c. vacuum
d. balanced - ANSWERS-a. pressurized
An advantage of natural gas use for boiler fuel is:
a. it is lighter than air
b. it is cheaper than coal
c. flow is easily measured and controlled
d. it is easily accessible - ANSWERS-c. flow is easily measured and
controlled
For power boilers, the lowest visible water level in a gauge glass shall
be at least _________ above the lowest permissible water level as
determined by the boiler manufacturer:
a. 25 mm
b. 50 mm
c. 75 mm
d. 100 mm - ANSWERS-b. 50 mm
ASME Section VI categorizes the water treatment of heating boilers
into different classes. Which of the following classes is for no
treatment?:
a. Class 2
The inner tube on a soot blower lance __________, and conveys
steam from the poppet valve to the outer tube:
a. advances the lance tube into the boiler
b. rotates in a spiral fashion
c. remains stationary
d. forms a helical blowing pattern - ANSWERS-c. remains stationary
This is a pressure vessel that intercepts, cools and depressurizes boiler
water in order to protect municipal sewer systems:
a. blowby vessel
b. blowthrough vessel
c. blowoff vessel
d. blowdown separator - ANSWERS-c. blowoff vessel
To reduce the total solids concentration in the boiler water, this is
done at all times:
a. coagulation
b. intermittent blowdown
c. chemical addition
d. continuous blowdown - ANSWERS-d. continuous blowdown
,The water temperature at the blowoff tank outlet must not exceed
_________ degrees C:
a. 75
b. 65
c. 85
d. 55 - ANSWERS-b. 65
According to ASME B31.1, at least one boiler blowoff valve must be
a _________ design:
a. Y-type
b. hard seated
c. quick opening
d. slow opening - ANSWERS-d. slow opening
Two element feedwater controllers respond to:
a. drum level and steam flow
b. drum level and feedwater flow
c. steam flow and feedwater flow
d. drum level and fuel flow - ANSWERS-a. drum level and steam
flow
Two independent low-water fuel cut-offs must be installed for steam
boiler:
a. producing high pressure steam
b. not continuously attended
,c. in areas with human occupancy
d. under national law - ANSWERS-b. not continuously attended
Combustion airflow to the furnace and flue gas flow from the furnace
are controlled with:
a. combustion velocity control and fan speed control
b. damper control and fan speed control
c. damper control and combustion velocity control
d. all of the listed items - ANSWERS-b. damper control and fan speed
control
The method and amount of air supplied for combustion depends on
the type of:
a. fuel being burned
b. draft system in place
c. atmospheric conditions
d. all of the listed items - ANSWERS-a. fuel being burned
This type of draft system relies on the difference in density to provide
combustion air to a furnace:
a. balanced draft
b. induced draft
c. forced draft
d. natural draft - ANSWERS-d. natural draft
, This type of fluidized bed boiler is used for combined cycle plants:
a. pressurized
b. atmospheric
c. vacuum
d. balanced - ANSWERS-a. pressurized
An advantage of natural gas use for boiler fuel is:
a. it is lighter than air
b. it is cheaper than coal
c. flow is easily measured and controlled
d. it is easily accessible - ANSWERS-c. flow is easily measured and
controlled
For power boilers, the lowest visible water level in a gauge glass shall
be at least _________ above the lowest permissible water level as
determined by the boiler manufacturer:
a. 25 mm
b. 50 mm
c. 75 mm
d. 100 mm - ANSWERS-b. 50 mm
ASME Section VI categorizes the water treatment of heating boilers
into different classes. Which of the following classes is for no
treatment?:
a. Class 2
