Type III — Low-PressureQuestion 165 of 240
Which of the following is a low-pressure refrigerant used in centrifugal chillers?
a.HCFC-123
b.HFC-410A
c.HCFC-22
d.HFC-404A
Explanation
HCFC-123 is a classic low-pressure chiller refrigerant, along with CFC-11 and the newer HFO R-1233zd. R-410A, R-22, and R-404A are all high-pressure refrigerants that operate above atmospheric pressure and fall under Type II. Low-pressure refrigerants boil above about 50°F at atmospheric pressure.
Law Reference: 40 CFR §82.152Practice all 240 questions free — no signup required.
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