Page |1
RETA INDUSTRIAL REFRIGERATION BOOK 2 EXAM NEWEST
2025/2026 NEWEST ACTUAL EXAM WITH COMPLETE
QUESTIONS AND VERIFIED ANSWERS |ALREADY GRADED
A+|
What determines the selection of a gravity flooded vs. dry
expansion systems? (pg. 7-2)
A) Require operating temperature
B) Economics based on an analysis by a design engineer
C) System size
D) Airflow requirements - ANSWER-B) Economics based on an
analysis by a design engineer
What causes liquid circulation through a gravity flooded
evaporator? (pg. 7-4)
A) The difference in refrigerant densities between the surge drum
and the evaporator heat transfer surfaces
B) A pump
C) The higher pressure in the surge drum forces the refrigerant
downward and into the evaporator
, Page |2
D) Superheat - ANSWER-A) The difference in refrigerant
densities between the surge drum and the evaporator heat
transfer surfaces
What happens to the un-evaporated liquid that circulates through
a gravity flooded evaporator? (pg. 7-2)
A) It returns to the evaporator through the defrost bypass line
B) The liquid is pumped back to the receiver
C) The receiver is isolated and the liquid is returned to the
evaporator feed line
D) The liquid flows to the surge drum and is returned to the
evaporator - ANSWER-D) The liquid flows to the surge drum and
is returned to the evaporator
A gravity flooded shell and tube product chiller? (pg. 7-6)
A) Usually has refrigerant in the shell
B) Usually has refrigerant in the tubes
C) Has refrigerant in the shell and the tubes
D) Is more efficient with the refrigerant in the tubes - ANSWER-A)
Usually has refrigerant in the shell
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As the load decreases on a gravity flooded evaporator, the
amount of liquid in the heat exchange circuits? (pg. 7-10)
A) Does not change
B) Increases
C) Decreases
D) Decreases by one-half - ANSWER-B) Increases
Having a DX evaporator and a gravity flooded evaporator of the
same size and surface area, why is capacity better for a gravity
flooded evaporator than in a dry expansion evaporator? (pg. 7-
1/2)
A) Gravity flooded evaporators are made from larger tubing than
dry expansion evaporators
B) Gravity flooded evaporators have greater wetted refrigerant
surfaces
C) Gravity flooded evaporators have more fins per inch
D) Gravity flooded evaporators operate at lower temperatures -
ANSWER-B) Gravity flooded evaporators have greater wetted
refrigerant surfaces
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What are two main components used in a gravity flooded
evaporator design not employed in a typical dry expansion
evaporator system? (pg. 7-2)
A) Two-speed fans and water defrost
B) A thermostatic expansion valve and a low temp cut-out
C) A surge vessel and liquid level control device
D) Fan shutters and 24 volt control - ANSWER-C) A surge vessel
and liquid level control device
The vapor leaving the surge drum on a gravity flooded evaporator
operating at design conditions is? (pg. 7-2)
A) Called "wet suction"
B) Superheated
C) Subcooled
D) Saturated - ANSWER-D) Saturated
Where should oil be drained from in a halocarbon gravity flooded
system?
RETA INDUSTRIAL REFRIGERATION BOOK 2 EXAM NEWEST
2025/2026 NEWEST ACTUAL EXAM WITH COMPLETE
QUESTIONS AND VERIFIED ANSWERS |ALREADY GRADED
A+|
What determines the selection of a gravity flooded vs. dry
expansion systems? (pg. 7-2)
A) Require operating temperature
B) Economics based on an analysis by a design engineer
C) System size
D) Airflow requirements - ANSWER-B) Economics based on an
analysis by a design engineer
What causes liquid circulation through a gravity flooded
evaporator? (pg. 7-4)
A) The difference in refrigerant densities between the surge drum
and the evaporator heat transfer surfaces
B) A pump
C) The higher pressure in the surge drum forces the refrigerant
downward and into the evaporator
, Page |2
D) Superheat - ANSWER-A) The difference in refrigerant
densities between the surge drum and the evaporator heat
transfer surfaces
What happens to the un-evaporated liquid that circulates through
a gravity flooded evaporator? (pg. 7-2)
A) It returns to the evaporator through the defrost bypass line
B) The liquid is pumped back to the receiver
C) The receiver is isolated and the liquid is returned to the
evaporator feed line
D) The liquid flows to the surge drum and is returned to the
evaporator - ANSWER-D) The liquid flows to the surge drum and
is returned to the evaporator
A gravity flooded shell and tube product chiller? (pg. 7-6)
A) Usually has refrigerant in the shell
B) Usually has refrigerant in the tubes
C) Has refrigerant in the shell and the tubes
D) Is more efficient with the refrigerant in the tubes - ANSWER-A)
Usually has refrigerant in the shell
, Page |3
As the load decreases on a gravity flooded evaporator, the
amount of liquid in the heat exchange circuits? (pg. 7-10)
A) Does not change
B) Increases
C) Decreases
D) Decreases by one-half - ANSWER-B) Increases
Having a DX evaporator and a gravity flooded evaporator of the
same size and surface area, why is capacity better for a gravity
flooded evaporator than in a dry expansion evaporator? (pg. 7-
1/2)
A) Gravity flooded evaporators are made from larger tubing than
dry expansion evaporators
B) Gravity flooded evaporators have greater wetted refrigerant
surfaces
C) Gravity flooded evaporators have more fins per inch
D) Gravity flooded evaporators operate at lower temperatures -
ANSWER-B) Gravity flooded evaporators have greater wetted
refrigerant surfaces
, Page |4
What are two main components used in a gravity flooded
evaporator design not employed in a typical dry expansion
evaporator system? (pg. 7-2)
A) Two-speed fans and water defrost
B) A thermostatic expansion valve and a low temp cut-out
C) A surge vessel and liquid level control device
D) Fan shutters and 24 volt control - ANSWER-C) A surge vessel
and liquid level control device
The vapor leaving the surge drum on a gravity flooded evaporator
operating at design conditions is? (pg. 7-2)
A) Called "wet suction"
B) Superheated
C) Subcooled
D) Saturated - ANSWER-D) Saturated
Where should oil be drained from in a halocarbon gravity flooded
system?
