Which group lists only refrigerants that 40 CFR 82.152 names as examples for low-pressure appliances?
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The question
Which group lists only refrigerants that 40 CFR 82.152 names as examples for low-pressure appliances?
- R-12, R-134a, R-500 and R-114
- R-22, R-410A, R-407C and R-404A
- R-11, R-123, R-113 and R-245faCorrect answer
- R-13, R-23, R-503 and R-508B
Why “R-11, R-123, R-113 and R-245fa” is correct
The definition of a low-pressure appliance lists R-11, R-123, R-113 and R-245fa as examples. All four have saturation pressures below 45 psia at 104 °F, which is why they are found in centrifugal chillers that operate near or below atmospheric pressure.
Source: 40 CFR 82.152
Why the other answers are wrong
- R-12, R-134a, R-500 and R-114 — These are higher-pressure refrigerants; none of them is a low-pressure example in the definition.
- R-22, R-410A, R-407C and R-404A — These run at much higher pressures and are typical of Type II equipment.
- R-13, R-23, R-503 and R-508B — These are the examples EPA gives for very high-pressure appliances.
Practice more of this
More EPA 608 Type III practice questions, or see every EPA 608 practice test.
Unofficial, not affiliated with the EPA or any EPA-approved certifying organization. Questions are original practice written from public EPA material, not real exam questions.