Engine : Refrigeration AC - 840/610
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| With regards to shipboard refrigeration systems, after July 1, 1992, what action became illegal? |
| A) working on a refrigeration system without permission of the Officer in Charge Marine Inspection |
| B) producing a class I refrigerant |
| C) intentionally venting class I or II refrigerants to the atmosphere |
| D) mixing R-12 and R-22 |
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