RETA Industrial Refrigeration Book 2 (2024 Revisio
RETA Industrial Refrigeration Book 2 (2024 Revisio
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RETA Industrial Refrigeration Book 2 (2024 Revision) Latest Update Actual Exam 300 Questions and 100% Verified Correct Answers Guaranteed A+ Verified by Professor
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RETA Industrial Refrigeration Book 2 (2024 Revisio
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RETA Industrial Refrigeration Book 2 (2024 Revisio
RETA Industrial Refrigeration Book 2 (2024 Revision) Latest Update Actual Exam 300 Questions and 100% Verified Correct Answers Guaranteed A+ Verified by Professor
RETA Industrial Refrigeration Book 2 (2024
Revision) Latest Update 2024-2025 Actual Exam
300 Questions and 100% Verified Correct
Answers Guaranteed A+ Verified by Professor
A 3:1 recirculation ratio means that the wet suction return line contains?
(pg. 6-4/51)
A) 3 parts liquid, 1 part vapor
B) 1 part liquid, 3 parts vapor
C) 2 parts liquid, 1 part vapor
D) 4 parts liquid, 1 part vapor - CORRECT ANSWER: C) 2 parts liquid, 1 part vapor
(3 to 1 means for every 3 quantities of liquid supplied, 1 will turn to vapor. Therefore, in
the return line, there would be 2 quantities of liquid and 1 quantity of vapor)
A balance tank does all but one of these in a three-pipe system. Which is it? (pg. 8-9)
A) Vents air from the return line
B) Equalizes static head
C) Allows for expansion and contraction of the brine solution
D) Store cooled refrigerant to reduce the cooling load - CORRECT ANSWER: D) Store
cooled refrigerant to reduce the cooling load
A cascade system is generally used? (pg. 9-25)
A) To reduce initial equipment costs
B) To improve evaporator capacity
C) To obtain greater efficiency than an intercooler
D) To obtain low to ultra-low temperatures while operating above 0 PSIG - CORRECT
ANSWER: D) To obtain low to ultra-low temperatures while operating above 0 PSIG
A cascade system is? (pg. 9-20)
,A) A refrigeration system in which the high temperature evaporator is the condenser for
the lower temperature section
B) A refrigeration system in which a single refrigerant is used and the low-stage
compressor is discharged to a high-stage compressor
C) A system with two or more compressors mounted on a single oil separator vessel
D) Ay system where the heat absorbed in the evaporator travels through multiple
components, cascading from one to the other - CORRECT ANSWER: A) A refrigeration
system in which the high temperature evaporator is the condenser for the lower
temperature section
A cascade system may be used? (pg. 9-25)
A) To reduce initial equipment costs
B) To improve evaporator capacity
C) To obtain great efficiency than an intercooler
D) To obtain -100°F or lower temperature - CORRECT ANSWER: D) To obtain -100°F or
lower temperature
A cascade system uses the? (pg. 9-20)
A) Compressor of a higher temperature system to absorb heat energy from the low
temp process
B) Latent heat of condensation of the higher temperature system to defrost the low temp
evaporators
C) Evaporator of the higher temperature system to condense the low temperature
system vapor
D) Condenser of the higher temperature system to evaporate the low temperature
system liquid - CORRECT ANSWER: C) Evaporator of the higher temperature system
to condense the low temperature system vapor
A gravity flooded evaporator contains ____________ a DX evaporator of the same
size? (pg. 7-1)
A) Less liquid than
B) More liquid than
,C) The same amount of liquid as
D) More flash gas than - CORRECT ANSWER: B) More liquid than
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 - CORRECT ANSWER: A) Usually
has refrigerant in the shell
A hand expansion valve can control the flow of refrigerant into an evaporator better than
a typical stop valve because? (pg. 4-4)
A) It is larger than the liquid line pipe size feeding it
B) It has an adjustable orifice designed to control flow
C) It is made of special alloy metal that expands and contracts with temperature change
D) Pointers can be attached to the hand wheel - CORRECT ANSWER: B) It has an
adjustable orifice designed to control flow
A high relative humidity will? (pg. 3-9/10)
A) Increase evaporative condenser capacity because there is more moisture in the air
B) Increase the infiltration load on a refrigeration system
C) Increase the time between evaporator defrosts
D) Decrease evaporative condenser capacity because there is less moisture in the air -
CORRECT ANSWER: B) Increase the infiltration load on a refrigeration system
A plate freezer that requires a recirculation ratio of 6:1 will return ____________ to the
low temperature recirculated suction line for each pound of liquid refrigerant evaporated
when operating at design conditions? (pg. 6-4)
A) 6 pounds of vapor
B) 5 pounds of liquid
, C) 1 pound of liquid
D) The same amount of liquid under all loads - CORRECT ANSWER: B) 5 pounds of
liquid
A pound of saturated refrigerant vapor contains ____________ heat energy (than/as) a
pound of the same refrigerant as a saturated liquid? (pg. 2-10)
A) Slightly less
B) Significantly less
C) More
D) The same - CORRECT ANSWER: C) More
A pumped liquid recirculation system sends 15°F liquid Ammonia out to the system. The
piping goes up to and over the roof, 21 feet above the pump outlet. The pump discharge
pressure is 45 PSIG. The pressure of the liquid in the pipe at the roof is? (pg. 6-6)
A) Approximately 45 PSIG
B) Approximately 39 PSIG
C) Approximately 51 PSIG
D) Saturated - CORRECT ANSWER: B) Approximately 39 PSIG
"Liquid pressure at the top of a 21' vertical rise will be approximately 6 PSIG less than
the pressure measured at the base of the rise"
A simple refrigeration cycle plotted on the enthalpy diagram illustrates why a condenser
must reject more heat than just the heat absorbed in the evaporator because of? (pg. 2-
17)
A) Subcooling
B) Heat of Compression
C) Saturation
D) Evaporation - CORRECT ANSWER: B) Heat of Compression
A vertical change (change of pressure) in the subcooled liquid region or in the saturated
mixture region __________ the enthalpy of the refrigerant at that point? (pg. 2-11)
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