Page 1 of 615
ABSA 4B EXAM | FREQUENTLY TESTED
QUESTIONS WITH CORRECT ANSWERS |
BRAND NEW!
The reciprocating motion is converted to rotational motion by the
____.
steam engines connecting rods
steam engines cylinder
steam engines crosshead
steam engines crankshaft
steam engines governor - ✔✔✔ Correct Answer > a
Forward curved blades produce the same output ____ as
backward inclined blades but operate at a slower rotational
speed.
ambient pressure
air pressure
latent heat
,Page 2 of 615
humidity
sensible heat - ✔✔✔ Correct Answer > b
A flush patch is installed once the ____ is cut out of the boiler
component.
warpage
corrosion
floc
blister
magnetite layer - ✔✔✔ Correct Answer > d
The same working fluid will be recycled and used again in a(n)
____.
required cycle gas turbine
closed cycle gas turbine
output cycle gas turbine
open cycle gas turbine
fuel cycle gas turbine - ✔✔✔ Correct Answer > b
Bicarbonates can be removed by ____.
,Page 3 of 615
heating the water to the temperature just below its boiling point
sodium sulphite
ammonia injecting
adding dissolved solids to the water
adding suspended solids to the water - ✔✔✔ Correct Answer > a
On the compressor discharge line in ammonia refrigeration
systems the ____ is installed.
receiver
oil separator
slug catcher
king valve
evaporator - ✔✔✔ Correct Answer > b
Due to the design of a ____ purging the exhaust gases from the
cylinder (scavenging) is difficult.
four-stroke engine
two-stroke engine
gas turbine
, Page 4 of 615
steam turbine
reactor - ✔✔✔ Correct Answer > b
The boiler feedwater should be treated to remove the
concentration of ____ to avoid boiler corrosion.
amine
dissolved gases
pH
magnetite
chelant - ✔✔✔ Correct Answer > b
A ____ would not be classified as a centrifugal fan.
forward curve fan
radial blade fan
backward inclined fan
airfoil blade fan
propeller fan - ✔✔✔ Correct Answer > d
Seasonal startup checks for an absorption refrigeration system
include:
ABSA 4B EXAM | FREQUENTLY TESTED
QUESTIONS WITH CORRECT ANSWERS |
BRAND NEW!
The reciprocating motion is converted to rotational motion by the
____.
steam engines connecting rods
steam engines cylinder
steam engines crosshead
steam engines crankshaft
steam engines governor - ✔✔✔ Correct Answer > a
Forward curved blades produce the same output ____ as
backward inclined blades but operate at a slower rotational
speed.
ambient pressure
air pressure
latent heat
,Page 2 of 615
humidity
sensible heat - ✔✔✔ Correct Answer > b
A flush patch is installed once the ____ is cut out of the boiler
component.
warpage
corrosion
floc
blister
magnetite layer - ✔✔✔ Correct Answer > d
The same working fluid will be recycled and used again in a(n)
____.
required cycle gas turbine
closed cycle gas turbine
output cycle gas turbine
open cycle gas turbine
fuel cycle gas turbine - ✔✔✔ Correct Answer > b
Bicarbonates can be removed by ____.
,Page 3 of 615
heating the water to the temperature just below its boiling point
sodium sulphite
ammonia injecting
adding dissolved solids to the water
adding suspended solids to the water - ✔✔✔ Correct Answer > a
On the compressor discharge line in ammonia refrigeration
systems the ____ is installed.
receiver
oil separator
slug catcher
king valve
evaporator - ✔✔✔ Correct Answer > b
Due to the design of a ____ purging the exhaust gases from the
cylinder (scavenging) is difficult.
four-stroke engine
two-stroke engine
gas turbine
, Page 4 of 615
steam turbine
reactor - ✔✔✔ Correct Answer > b
The boiler feedwater should be treated to remove the
concentration of ____ to avoid boiler corrosion.
amine
dissolved gases
pH
magnetite
chelant - ✔✔✔ Correct Answer > b
A ____ would not be classified as a centrifugal fan.
forward curve fan
radial blade fan
backward inclined fan
airfoil blade fan
propeller fan - ✔✔✔ Correct Answer > d
Seasonal startup checks for an absorption refrigeration system
include:
