ABSA 4B EXAM QUESTIONS AND ANSWERS
Internal ____ is not required for dynamic type compressors.
seals
lubrication
pressure monitoring
corrosion monitoring
temperature monitoring - CORRECT ANSWER✅✅b
Low pressure or high pressure are the two primary classifications of ____.
centrifugal pumps
sump pumps
boilers
draft fans
pressure controllers - CORRECT ANSWER✅✅e
The boiler feedwater becomes increasingly ____ as it approaches the measurement of zero.
acidic
neutral
softer
basic
alkaline - CORRECT ANSWER✅✅a
The following hydrocarbon(s) may be entrained in a natural gas stream:
Propane
,Butane
Ethane
Methane
All of the above - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅e
Every shift the boiler water should be ____.
filled with dissolved solids
tested
condensed
replaced
evaporated - CORRECT ANSWER✅✅b
Sodium sulphite is a commonly used ____ in boilers.
oxygen scavenger
carbon dioxide scavenger
coagulant
pH inhibitor
flocculant - CORRECT ANSWER✅✅a
,Cement may be used for the protective coating of a ____.
u-tube manometers
orifice plates
venturi tubes
pressure gauges
hot water storage tank - CORRECT ANSWER✅✅e
The hot exhaust gases from the gas turbine combustor travel downstream to be ____ in the turbine
blading.
expanded
filtered
heating
contracted
cooled - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅e
During the power stroke of a four-stroke engine, the ___ is combusted.
lubricating oil
hydrogen
air
fuel/air mixture
fuel - CORRECT ANSWER✅✅d
____ 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 - CORRECT ANSWER✅✅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
Internal ____ is not required for dynamic type compressors.
seals
lubrication
pressure monitoring
corrosion monitoring
temperature monitoring - CORRECT ANSWER✅✅b
Low pressure or high pressure are the two primary classifications of ____.
centrifugal pumps
sump pumps
boilers
draft fans
pressure controllers - CORRECT ANSWER✅✅e
The boiler feedwater becomes increasingly ____ as it approaches the measurement of zero.
acidic
neutral
softer
basic
alkaline - CORRECT ANSWER✅✅a
The following hydrocarbon(s) may be entrained in a natural gas stream:
Propane
,Butane
Ethane
Methane
All of the above - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅e
Every shift the boiler water should be ____.
filled with dissolved solids
tested
condensed
replaced
evaporated - CORRECT ANSWER✅✅b
Sodium sulphite is a commonly used ____ in boilers.
oxygen scavenger
carbon dioxide scavenger
coagulant
pH inhibitor
flocculant - CORRECT ANSWER✅✅a
,Cement may be used for the protective coating of a ____.
u-tube manometers
orifice plates
venturi tubes
pressure gauges
hot water storage tank - CORRECT ANSWER✅✅e
The hot exhaust gases from the gas turbine combustor travel downstream to be ____ in the turbine
blading.
expanded
filtered
heating
contracted
cooled - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅e
During the power stroke of a four-stroke engine, the ___ is combusted.
lubricating oil
hydrogen
air
fuel/air mixture
fuel - CORRECT ANSWER✅✅d
____ 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 - CORRECT ANSWER✅✅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
