RETA Industrial Refrigeration Book 1 Exam Newest
2025 Complete 250 Questions And Correct Answers
(Verified Answers) |Already Graded A+
Which refrigerant in table 3-2 would operate at the lowest suction pressure with an
evaporator temperature of 10°F? (pg. 3-4)
A) R-717
B) R-507
C) R-404a
D) R-134a
D) R-134a
Using table 3-2, which refrigerant listed below would require the most CFM for a one-
hundred-ton refrigeration load? (pg. 3-4)
A) R-717
B) R-507
C) R-404a
D) R-134a
D) R-134a
At 95°F, which refrigerant listed below would have the highest theoretical discharge
temperature with an evaporator temperature of 10°F? (pg. 3-4)
A) R-717
B) R-134a
C) HCFC-22
D) R-404a
A) R-717
Of the refrigerants listed below, which refrigerant requires the most pounds per minute per
ton to be circulated at 10°F evaporating, 95°F condensing? (pg. 3-4)
A) R-717
B) R-507
,C) HCFC-22
D) R-134a
B) R-507
A slight leak in a fitting on a HCFC-22 system causes the halide torch flam to? (pg. 3-23)
A) Turn purple
B) Go out
C) Turn green
D) Turn red
C) Turn green
If a reciprocating system's evaporator temperature is decreased, what happens to the
compressor theoretical discharge temperature? (pg. 3-6)
A) Discharge temperature rises
B) Discharge temperature is unaffected
C) Discharge temperature falls
D) Depends on type of condenser
A) Discharge temperature rises
At 93°F condensing and 0°F evaporating temperature, the theoretical discharge temperature
for ammonia is? (pg. 3-7)
A) 312°F
B) 255°F
C) 318°F
D) 242°F
D) 242°F
Which refrigerant requires the largest compressor displacement per ton? (pg. 3-4)
A) R-717
B) R-507
C) R-134a
D) HCFC-22
C) R-134a
Which is NOT a direct symptom of air in an ammonia system? (pg. 3-3)
A) Increased discharge temperature
B) Increased power consumption
,C) Decreased compressor capacity
D) Decreased evaporating temperature
D) Decreased evaporating temperature
Of the refrigerant listed below, which refrigerant has the highest mass flow rate requirement
at the same evaporator and condensing temperature? (pg. 3-4)
A) R-717
B) R-404a
C) HCFC-22
D) R-134a
B) R-404a
Which refrigerant was first phased out by the Montreal Protocol? (pg. 3-24)
A) Ammonia
B) CFC-12
C) HCFC-22
D) Sulfur Dioxide
B) CFC-12
As the ratio between the evaporator and condensing pressure increases? (pg. 3-6)
A) The theoretical discharge temperature decreases
B) The theoretical discharge temperature stays the same
C) The theoretical discharge temperature increases
D) The theoretical discharge and evaporating temperature increase
C) The theoretical discharge temperature increases
Under the Clean Air and Montreal Protocol? (pg. 3-24)
A) As long as a technician does not perform work on portions of system containing refrigerant
they do not need to be certified
B) As long as a technician is only adding refrigerant to a system, not reclaiming any it is not
necessary to be certified
C) A technician must be certified to do any work, including electrical repairs, to a unit
D) Technicians working on ammonia systems must be certified by an outside agency
A) As long as a technician does not perform work on portions of system containing refrigerant
they do not need to be certified
Refrigerant leaks are detected using? (pg. 3-20/22)
A) Either a halide torch or sulfur stick on HCFCs
, B) Either a sulfur stick on ammonia of electronic leak detector for CFC/HCFCs
C) Either a halide torch or sulfur stick on ammonia
D) Either a halide torch or litmus paper for ammonia
B) Either a sulfur stick on ammonia of electronic leak detector for CFC/HCFCs
A 300-ton refrigeration compressor operating at the conditions in table 3-2 would require?
(pg. 3-4)
A) 954 CFM for ammonia
B) 999 CFM for R-134a
C) 987 CFM for R-507
D) 1036 CFM for HCFC-22
C) 987 CFM for R-507
(requires 3.29 CFM/ton) (3.29 x 300 = 987CFM)
Under the same operating conditions, which refrigerant listed below has the greatest
refrigeration effect per pound? (pg. 3-4)
A) HFCF-22
B) R-717
C) R-134a
D) R-507
B) R-717
Under the same operating conditions, which refrigerant listed below would operate with the
lowest CFM per ton requirement? (pg. 3-4)
A) R-717
B) R-134a
C) HCFC-22
D) HCFC-502
A) R-717
The primary reason for concern about HCFC-22 concentration in an engine room is? (pg. 3-21)
A) Toxicity
B) Explosivity
C) Oxygen deprivation
D) Reactivity with other chemicals
C) Oxygen deprivation
2025 Complete 250 Questions And Correct Answers
(Verified Answers) |Already Graded A+
Which refrigerant in table 3-2 would operate at the lowest suction pressure with an
evaporator temperature of 10°F? (pg. 3-4)
A) R-717
B) R-507
C) R-404a
D) R-134a
D) R-134a
Using table 3-2, which refrigerant listed below would require the most CFM for a one-
hundred-ton refrigeration load? (pg. 3-4)
A) R-717
B) R-507
C) R-404a
D) R-134a
D) R-134a
At 95°F, which refrigerant listed below would have the highest theoretical discharge
temperature with an evaporator temperature of 10°F? (pg. 3-4)
A) R-717
B) R-134a
C) HCFC-22
D) R-404a
A) R-717
Of the refrigerants listed below, which refrigerant requires the most pounds per minute per
ton to be circulated at 10°F evaporating, 95°F condensing? (pg. 3-4)
A) R-717
B) R-507
,C) HCFC-22
D) R-134a
B) R-507
A slight leak in a fitting on a HCFC-22 system causes the halide torch flam to? (pg. 3-23)
A) Turn purple
B) Go out
C) Turn green
D) Turn red
C) Turn green
If a reciprocating system's evaporator temperature is decreased, what happens to the
compressor theoretical discharge temperature? (pg. 3-6)
A) Discharge temperature rises
B) Discharge temperature is unaffected
C) Discharge temperature falls
D) Depends on type of condenser
A) Discharge temperature rises
At 93°F condensing and 0°F evaporating temperature, the theoretical discharge temperature
for ammonia is? (pg. 3-7)
A) 312°F
B) 255°F
C) 318°F
D) 242°F
D) 242°F
Which refrigerant requires the largest compressor displacement per ton? (pg. 3-4)
A) R-717
B) R-507
C) R-134a
D) HCFC-22
C) R-134a
Which is NOT a direct symptom of air in an ammonia system? (pg. 3-3)
A) Increased discharge temperature
B) Increased power consumption
,C) Decreased compressor capacity
D) Decreased evaporating temperature
D) Decreased evaporating temperature
Of the refrigerant listed below, which refrigerant has the highest mass flow rate requirement
at the same evaporator and condensing temperature? (pg. 3-4)
A) R-717
B) R-404a
C) HCFC-22
D) R-134a
B) R-404a
Which refrigerant was first phased out by the Montreal Protocol? (pg. 3-24)
A) Ammonia
B) CFC-12
C) HCFC-22
D) Sulfur Dioxide
B) CFC-12
As the ratio between the evaporator and condensing pressure increases? (pg. 3-6)
A) The theoretical discharge temperature decreases
B) The theoretical discharge temperature stays the same
C) The theoretical discharge temperature increases
D) The theoretical discharge and evaporating temperature increase
C) The theoretical discharge temperature increases
Under the Clean Air and Montreal Protocol? (pg. 3-24)
A) As long as a technician does not perform work on portions of system containing refrigerant
they do not need to be certified
B) As long as a technician is only adding refrigerant to a system, not reclaiming any it is not
necessary to be certified
C) A technician must be certified to do any work, including electrical repairs, to a unit
D) Technicians working on ammonia systems must be certified by an outside agency
A) As long as a technician does not perform work on portions of system containing refrigerant
they do not need to be certified
Refrigerant leaks are detected using? (pg. 3-20/22)
A) Either a halide torch or sulfur stick on HCFCs
, B) Either a sulfur stick on ammonia of electronic leak detector for CFC/HCFCs
C) Either a halide torch or sulfur stick on ammonia
D) Either a halide torch or litmus paper for ammonia
B) Either a sulfur stick on ammonia of electronic leak detector for CFC/HCFCs
A 300-ton refrigeration compressor operating at the conditions in table 3-2 would require?
(pg. 3-4)
A) 954 CFM for ammonia
B) 999 CFM for R-134a
C) 987 CFM for R-507
D) 1036 CFM for HCFC-22
C) 987 CFM for R-507
(requires 3.29 CFM/ton) (3.29 x 300 = 987CFM)
Under the same operating conditions, which refrigerant listed below has the greatest
refrigeration effect per pound? (pg. 3-4)
A) HFCF-22
B) R-717
C) R-134a
D) R-507
B) R-717
Under the same operating conditions, which refrigerant listed below would operate with the
lowest CFM per ton requirement? (pg. 3-4)
A) R-717
B) R-134a
C) HCFC-22
D) HCFC-502
A) R-717
The primary reason for concern about HCFC-22 concentration in an engine room is? (pg. 3-21)
A) Toxicity
B) Explosivity
C) Oxygen deprivation
D) Reactivity with other chemicals
C) Oxygen deprivation
