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RETA Industrial Refrigeration Book 3 Exam Newest
2025 Complete 200 Questions And Correct Answers
(Verified Answers) |Already Graded A+
A reason to review defrost functions twice a year is to? (pg. 7-23/24)
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 pressure and time values .....answer.....D) Confirm
operating pressure and time values
The most accurate method for setting a hand expansion valve feeding an
overfed evaporator would be? (pg. 7-7, 9)
A) To set the valve to get a 0 degree superheat at the outlet of the coil
B) To set than 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 .....answer.....C) Using the
,2|Page
manufacturer's information of the hand expansion valve to calculate the Cv
and turns open
To prevent "dead heading" of refrigerant pumps during low, or no, load
conditions, a? (pg. 8-8)
A) Trained operator must monitor the system operation
B) Minimum flow valve is installed
C) Pressure switch is installed to stop the pump
D) Relief valve is installed .....answer.....B) Minimum flow valve is installed
A column of 20 degree Fahrenheit liquid ammonia is 7.7 feet tall. What is the
approximate pressure increase at the base of the column? (pg. 8-8)
A) 35 psi
B) 33 psi
C) 0 psi
D) 2 psi .....answer.....D) 2 psi
The outlet pressure regulator connected to a CPR? (pg. 8-16)
A) Works counter to the back pressure regulator
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B) Increases the CPR pressure if the pressure drops too low to provide liquid
flow
C) Causes a 5:1 liquid overfeed rate at the evaporator
D) Flows continuously .....answer.....B) Increases the CPR pressure if the
pressure drops too low to provide liquid flow
Which of the Gas Laws is used to determine the level of non-condensables in
a system? (pg. 9-2)
A) Guy-Loussac's Law of Constant Volume
B) Charles' Law of Constant Pressure
C) Boyle's Law of Constant Temperature
D) Dalton's Law of Partial Pressures .....answer.....D) Dalton's Law of Partial
Pressures
As an arc fault continues, an explosive expansion occurs, the arc blast. This
expansion is estimated to be how large? (pg. 10-5)
A) 40,000 to 1
B) Relatively small compared to most explosions
C) About the same size as a typical ammonia explosion
D) 10 atmospheres .....answer.....A) 40,000 to 1
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____________ are devices that convert a non-electrical physical quantity into
an electrical signal? (pg. 11-11)
A) Switches
B) Transducers
C) Conductors
D) Capacitors .....answer.....B) Transducers
Extended grease lines should be __________ during annual inspections of
condensers and cooling towers? (pg. 12-7)
A) Removed and purged
B) Filled to capacity
C) Replaced with shorter lines
D) Emptied completely .....answer.....A) Removed and purged
What are the three types of gas sensors used to detect refrigerant leaks? (pg.
13-1)
A) Solid State, Mechanical, Handheld
B) Personal, Area, Portable
C) Ultraviolet, Mechanical, Digital
RETA Industrial Refrigeration Book 3 Exam Newest
2025 Complete 200 Questions And Correct Answers
(Verified Answers) |Already Graded A+
A reason to review defrost functions twice a year is to? (pg. 7-23/24)
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 pressure and time values .....answer.....D) Confirm
operating pressure and time values
The most accurate method for setting a hand expansion valve feeding an
overfed evaporator would be? (pg. 7-7, 9)
A) To set the valve to get a 0 degree superheat at the outlet of the coil
B) To set than 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 .....answer.....C) Using the
,2|Page
manufacturer's information of the hand expansion valve to calculate the Cv
and turns open
To prevent "dead heading" of refrigerant pumps during low, or no, load
conditions, a? (pg. 8-8)
A) Trained operator must monitor the system operation
B) Minimum flow valve is installed
C) Pressure switch is installed to stop the pump
D) Relief valve is installed .....answer.....B) Minimum flow valve is installed
A column of 20 degree Fahrenheit liquid ammonia is 7.7 feet tall. What is the
approximate pressure increase at the base of the column? (pg. 8-8)
A) 35 psi
B) 33 psi
C) 0 psi
D) 2 psi .....answer.....D) 2 psi
The outlet pressure regulator connected to a CPR? (pg. 8-16)
A) Works counter to the back pressure regulator
,3|Page
B) Increases the CPR pressure if the pressure drops too low to provide liquid
flow
C) Causes a 5:1 liquid overfeed rate at the evaporator
D) Flows continuously .....answer.....B) Increases the CPR pressure if the
pressure drops too low to provide liquid flow
Which of the Gas Laws is used to determine the level of non-condensables in
a system? (pg. 9-2)
A) Guy-Loussac's Law of Constant Volume
B) Charles' Law of Constant Pressure
C) Boyle's Law of Constant Temperature
D) Dalton's Law of Partial Pressures .....answer.....D) Dalton's Law of Partial
Pressures
As an arc fault continues, an explosive expansion occurs, the arc blast. This
expansion is estimated to be how large? (pg. 10-5)
A) 40,000 to 1
B) Relatively small compared to most explosions
C) About the same size as a typical ammonia explosion
D) 10 atmospheres .....answer.....A) 40,000 to 1
, 4|Page
____________ are devices that convert a non-electrical physical quantity into
an electrical signal? (pg. 11-11)
A) Switches
B) Transducers
C) Conductors
D) Capacitors .....answer.....B) Transducers
Extended grease lines should be __________ during annual inspections of
condensers and cooling towers? (pg. 12-7)
A) Removed and purged
B) Filled to capacity
C) Replaced with shorter lines
D) Emptied completely .....answer.....A) Removed and purged
What are the three types of gas sensors used to detect refrigerant leaks? (pg.
13-1)
A) Solid State, Mechanical, Handheld
B) Personal, Area, Portable
C) Ultraviolet, Mechanical, Digital
