ABSA 4B EXAM 2025 QUESTIONS AND
ANSWERS
Internal ____ is not required for dynamic type compressors.
seals
lubrication
pressure monitoring
corrosion monitoring
temperature monitoring - ANS b
Low pressure or high pressure are the two primary classifications of ____.
centrifugal pumps
sump pumps
boilers
draft fans
pressure controllers - ANS e
The boiler feedwater becomes increasingly ____ as it approaches the measurement of zero.
acidic
neutral
1 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
,softer
basic
alkaline - ANS a
The following hydrocarbon(s) may be entrained in a natural gas stream:
Propane
Butane
Ethane
Methane
All of the above - ANS e
Although ____ is created, high viscosity oils are still preferred for low speed/high load systems.
lower floc point oils
lower oil friction
high pour point oils
high velocity oils
higher oil friction - ANS e
Every shift the boiler water should be ____.
filled with dissolved solids
tested
condensed
replaced
evaporated - ANS b
2 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
,Sodium sulphite is a commonly used ____ in boilers.
oxygen scavenger
carbon dioxide scavenger
coagulant
pH inhibitor
flocculant - ANS a
Cement may be used for the protective coating of a ____.
u-tube manometers
orifice plates
venturi tubes
pressure gauges
hot water storage tank - ANS e
The hot exhaust gases from the gas turbine combustor travel downstream to be ____ in the
turbine blading.
expanded
filtered
heating
contracted
cooled - ANS a
Recovery boilers must be shut down immediately when a tube leak develops because water
generates a violent physical reaction upon contacting ____.
3 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
, white liquor
black liquor
green liquor
molten smelt
cooking liquor - ANS d
In operating applications with high pressure and slow speed ____ are commonly used.
coagulants
light oils
low viscosity mineral oils
low viscosity synthetic oils
heavy oils - ANS e
During the power stroke of a four-stroke engine, the ___ is combusted.
lubricating oil
hydrogen
air
fuel/air mixture
fuel - ANS d
____ are small relief valves that do not relieve pressure but are installed in systems to warn of
impending overpressurization.
Rupture discs
4 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
ANSWERS
Internal ____ is not required for dynamic type compressors.
seals
lubrication
pressure monitoring
corrosion monitoring
temperature monitoring - ANS b
Low pressure or high pressure are the two primary classifications of ____.
centrifugal pumps
sump pumps
boilers
draft fans
pressure controllers - ANS e
The boiler feedwater becomes increasingly ____ as it approaches the measurement of zero.
acidic
neutral
1 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
,softer
basic
alkaline - ANS a
The following hydrocarbon(s) may be entrained in a natural gas stream:
Propane
Butane
Ethane
Methane
All of the above - ANS e
Although ____ is created, high viscosity oils are still preferred for low speed/high load systems.
lower floc point oils
lower oil friction
high pour point oils
high velocity oils
higher oil friction - ANS e
Every shift the boiler water should be ____.
filled with dissolved solids
tested
condensed
replaced
evaporated - ANS b
2 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
,Sodium sulphite is a commonly used ____ in boilers.
oxygen scavenger
carbon dioxide scavenger
coagulant
pH inhibitor
flocculant - ANS a
Cement may be used for the protective coating of a ____.
u-tube manometers
orifice plates
venturi tubes
pressure gauges
hot water storage tank - ANS e
The hot exhaust gases from the gas turbine combustor travel downstream to be ____ in the
turbine blading.
expanded
filtered
heating
contracted
cooled - ANS a
Recovery boilers must be shut down immediately when a tube leak develops because water
generates a violent physical reaction upon contacting ____.
3 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
, white liquor
black liquor
green liquor
molten smelt
cooking liquor - ANS d
In operating applications with high pressure and slow speed ____ are commonly used.
coagulants
light oils
low viscosity mineral oils
low viscosity synthetic oils
heavy oils - ANS e
During the power stroke of a four-stroke engine, the ___ is combusted.
lubricating oil
hydrogen
air
fuel/air mixture
fuel - ANS d
____ are small relief valves that do not relieve pressure but are installed in systems to warn of
impending overpressurization.
Rupture discs
4 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
