Under 40 CFR 82.152, a low-pressure appliance uses a refrigerant with a liquid-phase saturation pressure…
Section 608 regulations · EPA 608 Core. The correct answer, and the reasoning behind it.
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The question
Under 40 CFR 82.152, a low-pressure appliance uses a refrigerant with a liquid-phase saturation pressure below what level at 104 °F?
- 45 psiaCorrect answer
- 170 psia
- 355 psia
- 15 psig
Why “45 psia” is correct
A low-pressure appliance uses a refrigerant whose saturation pressure at 104 °F is below 45 psia. Examples named in the rule include R-11, R-123, R-113 and R-245fa, which are found mostly in centrifugal chillers.
Source: 40 CFR 82.152
Why the other answers are wrong
- 170 psia — 170 psia is the line between medium- and high-pressure.
- 355 psia — 355 psia is the top of the high-pressure range.
- 15 psig — The definition is written in psia at 104 °F, and 15 psig is not the cutoff.
Practice more of this
More EPA 608 Core 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.