ABSA 4B EXAM.FINAL TEST 2026\2027.
Internal ____ is not required for dynamic type compressors.
seals
lubrication
pressure monitoring
corrosion monitoring
temperature monitoring
b
Low pressure or high pressure are the two primary classifications of ____.
centrifugal pumps
sump pumps
boilers
draft fans
pressure controllers
e
The boiler feedwater becomes increasingly ____ as it approaches the measurement of zero.
acidic
neutral
softer
basic
alkaline
a
The following hydrocarbon(s) may be entrained in a natural gas stream:
Propane
Butane
Ethane
Methane
All of the above
e
,ABSA 4B EXAM.FINAL TEST 2026\2027.
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
e
Every shift the boiler water should be ____.
filled with dissolved solids
tested
condensed
replaced
evaporated
b
Sodium sulphite is a commonly used ____ in boilers.
oxygen scavenger
carbon dioxide scavenger
coagulant
pH inhibitor
flocculant
a
Cement may be used for the protective coating of a ____.
u-tube manometers
orifice plates
venturi tubes
pressure gauges
hot water storage tank
e
The hot exhaust gases from the gas turbine combustor travel downstream to be ____ in the
turbine blading.
,ABSA 4B EXAM.FINAL TEST 2026\2027.
expanded
filtered
heating
contracted
cooled
a
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
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
e
During the power stroke of a four-stroke engine, the ___ is combusted.
lubricating oil
hydrogen
air
fuel/air mixture
fuel
d
____ are small relief valves that do not relieve pressure but are installed in systems to warn of
impending overpressurization.
, ABSA 4B EXAM.FINAL TEST 2026\2027.
Rupture discs
Fusible plugs
Turbine overspeed trips
Sentinel valves
Safety relief valves
d
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
a
The antifriction bearing housing should have 2/3rd of empty space remaining after being topped
up with ____.
crude
water
lubrication
mineral oil
grease
e
Ammonia refrigerants have a high affinity for ____.
non-condensable gases
corrosion
coagulants
water
flocculants
d
Internal ____ is not required for dynamic type compressors.
seals
lubrication
pressure monitoring
corrosion monitoring
temperature monitoring
b
Low pressure or high pressure are the two primary classifications of ____.
centrifugal pumps
sump pumps
boilers
draft fans
pressure controllers
e
The boiler feedwater becomes increasingly ____ as it approaches the measurement of zero.
acidic
neutral
softer
basic
alkaline
a
The following hydrocarbon(s) may be entrained in a natural gas stream:
Propane
Butane
Ethane
Methane
All of the above
e
,ABSA 4B EXAM.FINAL TEST 2026\2027.
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
e
Every shift the boiler water should be ____.
filled with dissolved solids
tested
condensed
replaced
evaporated
b
Sodium sulphite is a commonly used ____ in boilers.
oxygen scavenger
carbon dioxide scavenger
coagulant
pH inhibitor
flocculant
a
Cement may be used for the protective coating of a ____.
u-tube manometers
orifice plates
venturi tubes
pressure gauges
hot water storage tank
e
The hot exhaust gases from the gas turbine combustor travel downstream to be ____ in the
turbine blading.
,ABSA 4B EXAM.FINAL TEST 2026\2027.
expanded
filtered
heating
contracted
cooled
a
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
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
e
During the power stroke of a four-stroke engine, the ___ is combusted.
lubricating oil
hydrogen
air
fuel/air mixture
fuel
d
____ are small relief valves that do not relieve pressure but are installed in systems to warn of
impending overpressurization.
, ABSA 4B EXAM.FINAL TEST 2026\2027.
Rupture discs
Fusible plugs
Turbine overspeed trips
Sentinel valves
Safety relief valves
d
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
a
The antifriction bearing housing should have 2/3rd of empty space remaining after being topped
up with ____.
crude
water
lubrication
mineral oil
grease
e
Ammonia refrigerants have a high affinity for ____.
non-condensable gases
corrosion
coagulants
water
flocculants
d
