Engine_2014 : General Subjects - 3275/3524
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| Which group of three refrigerants are considered low pressure refrigerants under the Clean Air act rules? |
| A) CFC-11, CFC-113 and R- 502 |
| B) CFC-11, CFC-113 and HCFC-123 |
| C) CFC-11, R-502 and HCFC-123 |
| D) CFC-11, CFC-114 and R 502 |
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