RETA Industrial Refrigeration Book 3 Exam
2025 | Complete Questions and Correct
Answers | Already Graded A+ | Verified
Answers | Just Released
There is a significant difference in procedure and practice when installing cold
piping insulation compared to steam or high temperature systems because? (pg.
6-15)
A) The securing practice for high temperature piping does not require banding a
jacket to the insulation
B) Exterior jacket choices are limited for high temperature applications
C) The type of "cell construction" of high temperature insulation is not important
D) The high temp system drives the water vapor away from the pipe ---------
CORRECT ANSWER-----------------D) The high temp system drives the water vapor
away from the pipe
Which of the following can results from untimely or ineffective maintenance of a
mechanical insulation system? (pg. 6-7)
A) Corrosion under insulation
B) Increased life span of the insulation system
C) Decreased maintenance costs
D) Decreased energy cost ---------CORRECT ANSWER-----------------A) Corrosion
under insulation
,Inspection of evaporator coils, fans, drain pans, bolts, etc., are part of _________?
(pg. 7-2)
A) Hazard assessment
B) Mechanical integrity
C) Non-destructive testing
D) Risk management plan ---------CORRECT ANSWER-----------------B) Mechanical
integrity
After defrost is complete, a large evaporator needs to go through a
depressurization phase to prevent? (pg. 7-25)
A) Hydraulic shock
B) Static pressure
C) Bottling up
D) Water carryover ---------CORRECT ANSWER-----------------A) Hydraulic shock
When defrosting is performed on an evaporator that does not have enough frost
on it, the result can be? (pg. 7-25)
A) Refrigerant leaks from overheated flange gaskets
B) The coil builds ice on the bottom circuit
C) Coils clear of frost
D) Bridging the defrost drain opening by ice ---------CORRECT ANSWER----------------
-D) Bridging the defrost drain opening by ice
,The re-freeze step of a hot gas defrost sequence is meant to? (pg. 7-25)
A) Reduce the evaporator pressure before re-entering the refrigeration phase
B) Purge the gas from the evaporator
C) Prevent ice forming on fan blades and evaporator shrouds
D) Increase the U value of the evaporator ---------CORRECT ANSWER-----------------
C) Prevent ice forming on fan blades and evaporator shrouds
Galvanic damage to evaporators is caused by? (pg. 7-21)
A) Acidic detergent applied during cleaning cycles
B) Dissimilar metals joined without electrical isolation
C) Harmonics from VFD driven fan motors
D) Grounding the building to the refrigeration piping ---------CORRECT ANSWER----
-------------B) Dissimilar metals joined without electrical isolation
A reason to review defrost functions twice a year is to? (pg. 7-24)
A) Confirm defrost drain line performance
B) Adjust the 24-hour clock for daylight savings time changes
C) Adjust for the increased amount of water vapor in the air in the winter
D) Confirm operating pressures and time values ---------CORRECT ANSWER-----------
------D) Confirm operating pressures and time values
, What is NOT an important concern when cleaning evaporators? (pg. 7-4)
A) Damage to the fins or tubes of the coil when water is applied too strongly
B) Using too high of a temperature cleaning agent that could cause a thermal
shock leading to a possible refrigerant release
C) The breaking loose of contaminants inside of the coil that will cause restrictions
and the loss of capacity
D) Using a cleaning agent which is not compatible with the material used in
construction of the coil ---------CORRECT ANSWER-----------------C) The breaking
loose of contaminants inside of the coil that will cause restrictions and the loss of
capacity
The most accurate method for setting a metering valve feeding an overfed
evaporator would be? (pg. 7-7/8/9)
A) To set the valve to get a 0 degree superheat at the outlet of the coil
B) To set the hand expansion valve to its midpoint and adjust the valve open or
closed to lower the room temperature
C) Using the manufacturer's information of the hand expansion valve to calculate
the Cv and turns open
D) To open the valve to its full open position and then close the valve two turns to
keep the other coils from starving ---------CORRECT ANSWER-----------------C) Using
the manufacturer's information of the hand expansion valve to calculate the Cv
and turns open
If you are having problems with the capacity of your condenser, you should
check? (pg. 4-22)
A) Wet bulb temperature of the inlet air compared to the surrounding area
2025 | Complete Questions and Correct
Answers | Already Graded A+ | Verified
Answers | Just Released
There is a significant difference in procedure and practice when installing cold
piping insulation compared to steam or high temperature systems because? (pg.
6-15)
A) The securing practice for high temperature piping does not require banding a
jacket to the insulation
B) Exterior jacket choices are limited for high temperature applications
C) The type of "cell construction" of high temperature insulation is not important
D) The high temp system drives the water vapor away from the pipe ---------
CORRECT ANSWER-----------------D) The high temp system drives the water vapor
away from the pipe
Which of the following can results from untimely or ineffective maintenance of a
mechanical insulation system? (pg. 6-7)
A) Corrosion under insulation
B) Increased life span of the insulation system
C) Decreased maintenance costs
D) Decreased energy cost ---------CORRECT ANSWER-----------------A) Corrosion
under insulation
,Inspection of evaporator coils, fans, drain pans, bolts, etc., are part of _________?
(pg. 7-2)
A) Hazard assessment
B) Mechanical integrity
C) Non-destructive testing
D) Risk management plan ---------CORRECT ANSWER-----------------B) Mechanical
integrity
After defrost is complete, a large evaporator needs to go through a
depressurization phase to prevent? (pg. 7-25)
A) Hydraulic shock
B) Static pressure
C) Bottling up
D) Water carryover ---------CORRECT ANSWER-----------------A) Hydraulic shock
When defrosting is performed on an evaporator that does not have enough frost
on it, the result can be? (pg. 7-25)
A) Refrigerant leaks from overheated flange gaskets
B) The coil builds ice on the bottom circuit
C) Coils clear of frost
D) Bridging the defrost drain opening by ice ---------CORRECT ANSWER----------------
-D) Bridging the defrost drain opening by ice
,The re-freeze step of a hot gas defrost sequence is meant to? (pg. 7-25)
A) Reduce the evaporator pressure before re-entering the refrigeration phase
B) Purge the gas from the evaporator
C) Prevent ice forming on fan blades and evaporator shrouds
D) Increase the U value of the evaporator ---------CORRECT ANSWER-----------------
C) Prevent ice forming on fan blades and evaporator shrouds
Galvanic damage to evaporators is caused by? (pg. 7-21)
A) Acidic detergent applied during cleaning cycles
B) Dissimilar metals joined without electrical isolation
C) Harmonics from VFD driven fan motors
D) Grounding the building to the refrigeration piping ---------CORRECT ANSWER----
-------------B) Dissimilar metals joined without electrical isolation
A reason to review defrost functions twice a year is to? (pg. 7-24)
A) Confirm defrost drain line performance
B) Adjust the 24-hour clock for daylight savings time changes
C) Adjust for the increased amount of water vapor in the air in the winter
D) Confirm operating pressures and time values ---------CORRECT ANSWER-----------
------D) Confirm operating pressures and time values
, What is NOT an important concern when cleaning evaporators? (pg. 7-4)
A) Damage to the fins or tubes of the coil when water is applied too strongly
B) Using too high of a temperature cleaning agent that could cause a thermal
shock leading to a possible refrigerant release
C) The breaking loose of contaminants inside of the coil that will cause restrictions
and the loss of capacity
D) Using a cleaning agent which is not compatible with the material used in
construction of the coil ---------CORRECT ANSWER-----------------C) The breaking
loose of contaminants inside of the coil that will cause restrictions and the loss of
capacity
The most accurate method for setting a metering valve feeding an overfed
evaporator would be? (pg. 7-7/8/9)
A) To set the valve to get a 0 degree superheat at the outlet of the coil
B) To set the hand expansion valve to its midpoint and adjust the valve open or
closed to lower the room temperature
C) Using the manufacturer's information of the hand expansion valve to calculate
the Cv and turns open
D) To open the valve to its full open position and then close the valve two turns to
keep the other coils from starving ---------CORRECT ANSWER-----------------C) Using
the manufacturer's information of the hand expansion valve to calculate the Cv
and turns open
If you are having problems with the capacity of your condenser, you should
check? (pg. 4-22)
A) Wet bulb temperature of the inlet air compared to the surrounding area
