Mastering the ABSA 4B Exam: Tips & Strategies.
A Comprehensive Verified Exam Study Guide
Latest Updated 2025/2026
Internal ____ is not required for dynamic type compressors.
seals
lubrication
pressure monitoring
corrosion monitoring
temperature monitoring - ansb
Low pressure or high pressure are the two primary classifications of ____.
centrifugal pumps
sump pumps
boilers
draft fans
pressure controllers - anse
The boiler feedwater becomes increasingly ____ as it approaches the measurement of zero.
acidic
neutral
softer
basic
alkaline - ansa
The following hydrocarbon(s) may be entrained in a natural gas stream:
Propane
Butane
Ethane
Methane
All of the above - anse
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 - anse
Every shift the boiler water should be ____.
filled with dissolved solids
tested
condensed
replaced
evaporated - ansb
Sodium sulphite is a commonly used ____ in boilers.
oxygen scavenger
carbon dioxide scavenger
coagulant
,Mastering the ABSA 4B Exam: Tips & Strategies.
A Comprehensive Verified Exam Study Guide
Latest Updated 2025/2026
pH inhibitor
flocculant - ansa
Cement may be used for the protective coating of a ____.
u-tube manometers
orifice plates
venturi tubes
pressure gauges
hot water storage tank - anse
The hot exhaust gases from the gas turbine combustor travel downstream to be ____ in the
turbine blading.
expanded
filtered
heating
contracted
cooled - ansa
Recovery boilers must be shut down immediately when a tube leak develops because water
generates a violent physical reaction upon contacting ____.
white liquor
black liquor
green liquor
molten smelt
cooking liquor - ansd
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 - anse
During the power stroke of a four-stroke engine, the ___ is combusted.
lubricating oil
hydrogen
air
fuel/air mixture
fuel - ansd
____ are small relief valves that do not relieve pressure but are installed in systems to warn of
impending overpressurization.
Rupture discs
Fusible plugs
Turbine overspeed trips
Sentinel valves
Safety relief valves - ansd
,Mastering the ABSA 4B Exam: Tips & Strategies.
A Comprehensive Verified Exam Study Guide
Latest Updated 2025/2026
The oil used in ____ must be able to dissipate the compressor heat and be easily separated
from the refrigerant.
refrigeration compressors
reciprocating pumps
air compressors
steam turbines
gas turbines - ansa
The antifriction bearing housing should have 2/3rd of empty space remaining after being
topped up with ____.
crude
water
lubrication
mineral oil
grease - anse
Ammonia refrigerants have a high affinity for ____.
non-condensable gases
corrosion
coagulants
water
flocculants - ansd
A ____ is a simple machine with two or more pulleys with a rope or cable threaded between
them.
hoist
hacksaw
block and tackle
scaffolding
portable grinder - ansc
____ is one of the primary disadvantages of electric heating.
Response time
Increased corrosion
Increased operating cost
Decreased heat output
Increased maintenance costs - ansc
____ protocol should be used if the boiler will be exposed to subfreezing temperatures or will
be shut down for an extended period or when there will be no foreseeable urgency to restart
the boiler.
Hot boiler lay-up
Ready boiler lay-up
Wet boiler lay-up
Active boiler lay-up
Dry boiler lay-up - anse
A hammer is classified as a ____.
, Mastering the ABSA 4B Exam: Tips & Strategies.
A Comprehensive Verified Exam Study Guide
Latest Updated 2025/2026
recording device
power tool
hand tool
measurement device
calibration device - ansc
____ is too toxic to be used as a refrigerant in building air conditioning systems.
Water
Freon
Lithium Bromide
Air
Ammonia - anse
The biological breakdown of bacteria in a closed vessel could produce ____.
water
air
precipitation
oxygen
methane gases - anse
Boiler feedwater is chemically treated to:
Reduce foaming
Reduce scale formation
Minimize boiler metal corrosion
Reduce carryover
All of the above - anse
A ____ is a simple machine used to lift or pull heavy loads with two or more pulleys with a
rope or cable threaded between them.
hoist
hacksaw
block and tackle
portable grinder
scaffolding - ansc
To prevent accumulation of oil deposits in ____ downstream equipment must be installed to
filter and remove the oil from the air.
four stroke engines
reciprocating engines
labyrinth seals
compressed air systems
two stroke engines - ansd
Thermostats may be categorized:
The inherent design of the temperature sensing element
The control action
The temperature range
A Comprehensive Verified Exam Study Guide
Latest Updated 2025/2026
Internal ____ is not required for dynamic type compressors.
seals
lubrication
pressure monitoring
corrosion monitoring
temperature monitoring - ansb
Low pressure or high pressure are the two primary classifications of ____.
centrifugal pumps
sump pumps
boilers
draft fans
pressure controllers - anse
The boiler feedwater becomes increasingly ____ as it approaches the measurement of zero.
acidic
neutral
softer
basic
alkaline - ansa
The following hydrocarbon(s) may be entrained in a natural gas stream:
Propane
Butane
Ethane
Methane
All of the above - anse
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 - anse
Every shift the boiler water should be ____.
filled with dissolved solids
tested
condensed
replaced
evaporated - ansb
Sodium sulphite is a commonly used ____ in boilers.
oxygen scavenger
carbon dioxide scavenger
coagulant
,Mastering the ABSA 4B Exam: Tips & Strategies.
A Comprehensive Verified Exam Study Guide
Latest Updated 2025/2026
pH inhibitor
flocculant - ansa
Cement may be used for the protective coating of a ____.
u-tube manometers
orifice plates
venturi tubes
pressure gauges
hot water storage tank - anse
The hot exhaust gases from the gas turbine combustor travel downstream to be ____ in the
turbine blading.
expanded
filtered
heating
contracted
cooled - ansa
Recovery boilers must be shut down immediately when a tube leak develops because water
generates a violent physical reaction upon contacting ____.
white liquor
black liquor
green liquor
molten smelt
cooking liquor - ansd
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 - anse
During the power stroke of a four-stroke engine, the ___ is combusted.
lubricating oil
hydrogen
air
fuel/air mixture
fuel - ansd
____ are small relief valves that do not relieve pressure but are installed in systems to warn of
impending overpressurization.
Rupture discs
Fusible plugs
Turbine overspeed trips
Sentinel valves
Safety relief valves - ansd
,Mastering the ABSA 4B Exam: Tips & Strategies.
A Comprehensive Verified Exam Study Guide
Latest Updated 2025/2026
The oil used in ____ must be able to dissipate the compressor heat and be easily separated
from the refrigerant.
refrigeration compressors
reciprocating pumps
air compressors
steam turbines
gas turbines - ansa
The antifriction bearing housing should have 2/3rd of empty space remaining after being
topped up with ____.
crude
water
lubrication
mineral oil
grease - anse
Ammonia refrigerants have a high affinity for ____.
non-condensable gases
corrosion
coagulants
water
flocculants - ansd
A ____ is a simple machine with two or more pulleys with a rope or cable threaded between
them.
hoist
hacksaw
block and tackle
scaffolding
portable grinder - ansc
____ is one of the primary disadvantages of electric heating.
Response time
Increased corrosion
Increased operating cost
Decreased heat output
Increased maintenance costs - ansc
____ protocol should be used if the boiler will be exposed to subfreezing temperatures or will
be shut down for an extended period or when there will be no foreseeable urgency to restart
the boiler.
Hot boiler lay-up
Ready boiler lay-up
Wet boiler lay-up
Active boiler lay-up
Dry boiler lay-up - anse
A hammer is classified as a ____.
, Mastering the ABSA 4B Exam: Tips & Strategies.
A Comprehensive Verified Exam Study Guide
Latest Updated 2025/2026
recording device
power tool
hand tool
measurement device
calibration device - ansc
____ is too toxic to be used as a refrigerant in building air conditioning systems.
Water
Freon
Lithium Bromide
Air
Ammonia - anse
The biological breakdown of bacteria in a closed vessel could produce ____.
water
air
precipitation
oxygen
methane gases - anse
Boiler feedwater is chemically treated to:
Reduce foaming
Reduce scale formation
Minimize boiler metal corrosion
Reduce carryover
All of the above - anse
A ____ is a simple machine used to lift or pull heavy loads with two or more pulleys with a
rope or cable threaded between them.
hoist
hacksaw
block and tackle
portable grinder
scaffolding - ansc
To prevent accumulation of oil deposits in ____ downstream equipment must be installed to
filter and remove the oil from the air.
four stroke engines
reciprocating engines
labyrinth seals
compressed air systems
two stroke engines - ansd
Thermostats may be categorized:
The inherent design of the temperature sensing element
The control action
The temperature range
